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2017-02-23 06:26:44 +08:00
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2017-03-21 01:33:21 +08:00
< div class = "title" > /data/users/matthijs/github_faiss/faiss/Clustering.cpp< / div > < / div >
2017-02-23 06:26:44 +08:00
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< div class = "line" > < a name = "l00002" > < / a > < span class = "lineno" > 2< / span >   < span class = "comment" > /**< / span > < / div >
< div class = "line" > < a name = "l00003" > < / a > < span class = "lineno" > 3< / span >   < span class = "comment" > * Copyright (c) 2015-present, Facebook, Inc.< / span > < / div >
< div class = "line" > < a name = "l00004" > < / a > < span class = "lineno" > 4< / span >   < span class = "comment" > * All rights reserved.< / span > < / div >
< div class = "line" > < a name = "l00005" > < / a > < span class = "lineno" > 5< / span >   < span class = "comment" > *< / span > < / div >
< div class = "line" > < a name = "l00006" > < / a > < span class = "lineno" > 6< / span >   < span class = "comment" > * This source code is licensed under the CC-by-NC license found in the< / span > < / div >
< div class = "line" > < a name = "l00007" > < / a > < span class = "lineno" > 7< / span >   < span class = "comment" > * LICENSE file in the root directory of this source tree.< / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < span class = "comment" > /* Copyright 2004-present Facebook. All Rights Reserved.< / span > < / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < span class = "comment" > kmeans clustering routines< / span > < / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < span class = "preprocessor" > #include " Clustering.h" < / span > < / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < span class = "preprocessor" > #include < cmath> < / span > < / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < span class = "preprocessor" > #include < cstdio> < / span > < / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < span class = "preprocessor" > #include < cstring> < / span > < / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < span class = "preprocessor" > #include " utils.h" < / span > < / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   < span class = "preprocessor" > #include " FaissAssert.h" < / span > < / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   < span class = "preprocessor" > #include " IndexFlat.h" < / span > < / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   < / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   < span class = "keyword" > namespace < / span > faiss {< / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > < a class = "line" href = "structfaiss_1_1ClusteringParameters.html#a86c8802261041f5d49b1a0d296da60be" > 28< / a > < / span >   < a class = "code" href = "structfaiss_1_1ClusteringParameters.html#a86c8802261041f5d49b1a0d296da60be" > ClusteringParameters::ClusteringParameters< / a > ():< / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   niter(25),< / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   nredo(1),< / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   verbose(false), spherical(false),< / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   update_index(false),< / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   min_points_per_centroid(39),< / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   max_points_per_centroid(256),< / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   seed(1234)< / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   {}< / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   < span class = "comment" > // 39 corresponds to 10000 / 256 -> to avoid warnings on PQ tests with randu10k< / span > < / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   < / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   < / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > < a class = "line" href = "structfaiss_1_1Clustering.html#a2fa90a2681dc42faaf2435e63a5ae9b4" > 40< / a > < / span >   < a class = "code" href = "structfaiss_1_1Clustering.html#a2fa90a2681dc42faaf2435e63a5ae9b4" > Clustering::Clustering< / a > (< span class = "keywordtype" > int< / span > d, < span class = "keywordtype" > int< / span > k):< / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   d(d), k(k) {}< / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   < / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   < a class = "code" href = "structfaiss_1_1Clustering.html#a2fa90a2681dc42faaf2435e63a5ae9b4" > Clustering::Clustering< / a > (< span class = "keywordtype" > int< / span > d, < span class = "keywordtype" > int< / span > k, < span class = "keyword" > const< / span > < a class = "code" href = "structfaiss_1_1ClusteringParameters.html" > ClusteringParameters< / a > & cp):< / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   < a class = "code" href = "structfaiss_1_1ClusteringParameters.html" > ClusteringParameters< / a > (cp), d(d), k(k) {}< / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   < / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   < / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   < / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   < span class = "keyword" > static< / span > < span class = "keywordtype" > double< / span > imbalance_factor (< span class = "keywordtype" > int< / span > n, < span class = "keywordtype" > int< / span > k, < span class = "keywordtype" > long< / span > *assign) {< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   std::vector< int> hist(k, 0);< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < n; i++)< / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   hist[assign[i]]++;< / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   < / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < span class = "keywordtype" > double< / span > tot = 0, uf = 0;< / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   < / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0 ; i < k ; i++) {< / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   tot += hist[i];< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   uf += hist[i] * (double) hist[i];< / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   }< / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   uf = uf * k / (tot * tot);< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   < / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   < span class = "keywordflow" > return< / span > uf;< / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   }< / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   < / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   < / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   < / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   < / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > < a class = "line" href = "structfaiss_1_1Clustering.html#a839f210abb11c7a1c7162e336e0ff9cf" > 67< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "structfaiss_1_1Clustering.html#a839f210abb11c7a1c7162e336e0ff9cf" > Clustering::train< / a > (idx_t nx, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *x_in, < a class = "code" href = "structfaiss_1_1Index.html" > Index< / a > & index) {< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   FAISS_ASSERT (nx > = k ||< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   !< span class = "stringliteral" > " need at least as many training points as clusters" < / span > );< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   < / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   < span class = "keywordtype" > double< / span > t0 = < a class = "code" href = "namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb" > getmillisecs< / a > ();< / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   < / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   < span class = "comment" > // yes it is the user' s responsibility, but it may spare us some< / span > < / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < span class = "comment" > // hard-to-debug reports.< / span > < / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < nx * < a class = "code" href = "structfaiss_1_1Clustering.html#afbf6efacae54c58586b75ed790facd74" > d< / a > ; i++) {< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   FAISS_ASSERT (finite (x_in[i]) ||< / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   !< span class = "stringliteral" > " input contains NaN' s or Inf' s" < / span > );< / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   }< / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   < / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *x = x_in;< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   < / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   < span class = "keywordflow" > if< / span > (nx > k * < a class = "code" href = "structfaiss_1_1ClusteringParameters.html#a993e0a035248faad6e292a5ef9af1953" > max_points_per_centroid< / a > ) {< / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   < span class = "keywordflow" > if< / span > (verbose)< / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   printf(< span class = "stringliteral" > " Sampling a subset of %ld / %ld for training\n" < / span > ,< / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   k * max_points_per_centroid, nx);< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   < span class = "keywordtype" > int< / span > *perm = < span class = "keyword" > new< / span > < span class = "keywordtype" > int< / span > [nx];< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   rand_perm (perm, nx, < a class = "code" href = "structfaiss_1_1ClusteringParameters.html#a509c65e2ebe6ecabebd163ecb03c5579" > seed< / a > );< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   nx = k * < a class = "code" href = "structfaiss_1_1ClusteringParameters.html#a993e0a035248faad6e292a5ef9af1953" > max_points_per_centroid< / a > ;< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   < span class = "keywordtype" > float< / span > * x_new = < span class = "keyword" > new< / span > < span class = "keywordtype" > float< / span > [nx * < a class = "code" href = "structfaiss_1_1Clustering.html#afbf6efacae54c58586b75ed790facd74" > d< / a > ];< / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   < span class = "keywordflow" > for< / span > (idx_t i = 0; i < nx; i++)< / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   memcpy (x_new + i * d, x + perm[i] * d, < span class = "keyword" > sizeof< / span > (x_new[0]) * d);< / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   < span class = "keyword" > delete< / span > [] perm;< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   x = x_new;< / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (nx < k * < a class = "code" href = "structfaiss_1_1ClusteringParameters.html#a5af907901147a9b1e748b13305839924" > min_points_per_centroid< / a > ) {< / div >
< div class = "line" > < a name = "l00095" > < / a > < span class = "lineno" > 95< / span >   fprintf (stderr,< / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   < span class = "stringliteral" > " WARNING clustering %ld points to %ld centroids: " < / span > < / div >
< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   < span class = "stringliteral" > " please provide at least %ld training points\n" < / span > ,< / div >
< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   nx, k, idx_t(k) * min_points_per_centroid);< / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   }< / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   < / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   < span class = "keywordflow" > if< / span > (verbose)< / div >
< div class = "line" > < a name = "l00102" > < / a > < span class = "lineno" > 102< / span >   printf(< span class = "stringliteral" > " Clustering %d points in %ldD to %ld clusters, " < / span > < / div >
< div class = "line" > < a name = "l00103" > < / a > < span class = "lineno" > 103< / span >   < span class = "stringliteral" > " redo %d times, %d iterations\n" < / span > ,< / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   < span class = "keywordtype" > int< / span > (nx), d, k, < a class = "code" href = "structfaiss_1_1ClusteringParameters.html#a11a049c40c376c57ac6cc3b8d5d1d58b" > nredo< / a > , < a class = "code" href = "structfaiss_1_1ClusteringParameters.html#a5c7c6f05c75e1668befdb3be148fd5f9" > niter< / a > );< / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   < / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   < / div >
2017-03-21 01:33:21 +08:00
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   idx_t * assign = < span class = "keyword" > new< / span > idx_t[nx];< / div >
< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > 108< / span >   < span class = "keywordtype" > float< / span > * dis = < span class = "keyword" > new< / span > < span class = "keywordtype" > float< / span > [nx];< / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   < / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   < span class = "keywordtype" > float< / span > best_err = 1e50;< / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   < span class = "keywordtype" > double< / span > t_search_tot = 0;< / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   < span class = "keywordflow" > if< / span > (verbose) {< / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   printf(< span class = "stringliteral" > " Preprocessing in %.2f s\n" < / span > ,< / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   (< a class = "code" href = "namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb" > getmillisecs< / a > () - t0)/1000.);< / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   }< / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   t0 = < a class = "code" href = "namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb" > getmillisecs< / a > ();< / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   < / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > redo = 0; redo < < a class = "code" href = "structfaiss_1_1ClusteringParameters.html#a11a049c40c376c57ac6cc3b8d5d1d58b" > nredo< / a > ; redo++) {< / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > 119< / span >   < / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   std::vector< float> buf_centroids;< / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   < / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   std::vector< float> & cur_centroids =< / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   nredo == 1 ? < a class = "code" href = "structfaiss_1_1Clustering.html#a64c5ec0b4a7967d8be2872974b455ff1" > centroids< / a > : buf_centroids;< / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   < / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > 125< / span >   < span class = "keywordflow" > if< / span > (verbose & & nredo > 1) {< / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   printf(< span class = "stringliteral" > " Outer iteration %d / %d\n" < / span > , redo, nredo);< / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   }< / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > 128< / span >   < / div >
< div class = "line" > < a name = "l00129" > < / a > < span class = "lineno" > 129< / span >   < span class = "keywordflow" > if< / span > (cur_centroids.size() == 0) {< / div >
< div class = "line" > < a name = "l00130" > < / a > < span class = "lineno" > 130< / span >   < span class = "comment" > // initialize centroids with random points from the dataset< / span > < / div >
< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > 131< / span >   cur_centroids.resize (d * k);< / div >
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   < span class = "keywordtype" > int< / span > *perm = < span class = "keyword" > new< / span > < span class = "keywordtype" > int< / span > [nx];< / div >
< div class = "line" > < a name = "l00133" > < / a > < span class = "lineno" > 133< / span >   rand_perm (perm, nx, < a class = "code" href = "structfaiss_1_1ClusteringParameters.html#a509c65e2ebe6ecabebd163ecb03c5579" > seed< / a > + 1 + redo * 15486557L);< / div >
< div class = "line" > < a name = "l00134" > < / a > < span class = "lineno" > 134< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00135" > < / a > < span class = "lineno" > 135< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < < a class = "code" href = "structfaiss_1_1Clustering.html#a87581785d9516c683bbc7c9392bfa993" > k< / a > ; i++)< / div >
< div class = "line" > < a name = "l00136" > < / a > < span class = "lineno" > 136< / span >   memcpy (& cur_centroids[i * d], x + perm[i] * d,< / div >
< div class = "line" > < a name = "l00137" > < / a > < span class = "lineno" > 137< / span >   d * < span class = "keyword" > sizeof< / span > (< span class = "keywordtype" > float< / span > ));< / div >
< div class = "line" > < a name = "l00138" > < / a > < span class = "lineno" > 138< / span >   < span class = "keyword" > delete< / span > [] perm;< / div >
< div class = "line" > < a name = "l00139" > < / a > < span class = "lineno" > 139< / span >   } < span class = "keywordflow" > else< / span > { < span class = "comment" > // assume user provides some meaningful initialization< / span > < / div >
< div class = "line" > < a name = "l00140" > < / a > < span class = "lineno" > 140< / span >   FAISS_ASSERT (cur_centroids.size() == d * < a class = "code" href = "structfaiss_1_1Clustering.html#a87581785d9516c683bbc7c9392bfa993" > k< / a > );< / div >
< div class = "line" > < a name = "l00141" > < / a > < span class = "lineno" > 141< / span >   FAISS_ASSERT (nredo == 1 ||< / div >
< div class = "line" > < a name = "l00142" > < / a > < span class = "lineno" > 142< / span >   !< span class = "stringliteral" > " will redo with same initialization" < / span > );< / div >
< div class = "line" > < a name = "l00143" > < / a > < span class = "lineno" > 143< / span >   }< / div >
< div class = "line" > < a name = "l00144" > < / a > < span class = "lineno" > 144< / span >   < / div >
< div class = "line" > < a name = "l00145" > < / a > < span class = "lineno" > 145< / span >   < span class = "keywordflow" > if< / span > (< a class = "code" href = "structfaiss_1_1ClusteringParameters.html#ad997fb511f574f7ddc69938c21612f8d" > spherical< / a > )< / div >
< div class = "line" > < a name = "l00146" > < / a > < span class = "lineno" > 146< / span >   fvec_renorm_L2 (d, k, cur_centroids.data());< / div >
< div class = "line" > < a name = "l00147" > < / a > < span class = "lineno" > 147< / span >   < / div >
< div class = "line" > < a name = "l00148" > < / a > < span class = "lineno" > 148< / span >   < span class = "keywordflow" > if< / span > (!index.< a class = "code" href = "structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f" > is_trained< / a > )< / div >
< div class = "line" > < a name = "l00149" > < / a > < span class = "lineno" > 149< / span >   index.< a class = "code" href = "structfaiss_1_1Index.html#a8f67dfd73993e192dc78f2c93d9d9532" > train< / a > (k, cur_centroids.data());< / div >
< div class = "line" > < a name = "l00150" > < / a > < span class = "lineno" > 150< / span >   < / div >
< div class = "line" > < a name = "l00151" > < / a > < span class = "lineno" > 151< / span >   FAISS_ASSERT (index.< a class = "code" href = "structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd" > ntotal< / a > == 0);< / div >
< div class = "line" > < a name = "l00152" > < / a > < span class = "lineno" > 152< / span >   index.< a class = "code" href = "structfaiss_1_1Index.html#a1b5e9ac70adbce0897dd6c8276ad96f2" > add< / a > (k, cur_centroids.data());< / div >
< div class = "line" > < a name = "l00153" > < / a > < span class = "lineno" > 153< / span >   < span class = "keywordtype" > float< / span > err = 0;< / div >
< div class = "line" > < a name = "l00154" > < / a > < span class = "lineno" > 154< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < < a class = "code" href = "structfaiss_1_1ClusteringParameters.html#a5c7c6f05c75e1668befdb3be148fd5f9" > niter< / a > ; i++) {< / div >
< div class = "line" > < a name = "l00155" > < / a > < span class = "lineno" > 155< / span >   < span class = "keywordtype" > double< / span > t0s = < a class = "code" href = "namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb" > getmillisecs< / a > ();< / div >
< div class = "line" > < a name = "l00156" > < / a > < span class = "lineno" > 156< / span >   index.< a class = "code" href = "structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7" > search< / a > (nx, x, 1, dis, assign);< / div >
< div class = "line" > < a name = "l00157" > < / a > < span class = "lineno" > 157< / span >   t_search_tot += < a class = "code" href = "namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb" > getmillisecs< / a > () - t0s;< / div >
< div class = "line" > < a name = "l00158" > < / a > < span class = "lineno" > 158< / span >   < / div >
< div class = "line" > < a name = "l00159" > < / a > < span class = "lineno" > 159< / span >   err = 0;< / div >
< div class = "line" > < a name = "l00160" > < / a > < span class = "lineno" > 160< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > j = 0; j < nx; j++)< / div >
< div class = "line" > < a name = "l00161" > < / a > < span class = "lineno" > 161< / span >   err += dis[j];< / div >
< div class = "line" > < a name = "l00162" > < / a > < span class = "lineno" > 162< / span >   < a class = "code" href = "structfaiss_1_1Clustering.html#a91e32da946477bb751706a68c5cd3327" > obj< / a > .push_back (err);< / div >
< div class = "line" > < a name = "l00163" > < / a > < span class = "lineno" > 163< / span >   < / div >
< div class = "line" > < a name = "l00164" > < / a > < span class = "lineno" > 164< / span >   < span class = "keywordtype" > int< / span > nsplit = < a class = "code" href = "namespacefaiss.html#ad1cfbe51f2d77dc5094e0140f5955165" > km_update_centroids< / a > (x, cur_centroids.data(),< / div >
< div class = "line" > < a name = "l00165" > < / a > < span class = "lineno" > 165< / span >   assign, < a class = "code" href = "structfaiss_1_1Clustering.html#afbf6efacae54c58586b75ed790facd74" > d< / a > , < a class = "code" href = "structfaiss_1_1Clustering.html#a87581785d9516c683bbc7c9392bfa993" > k< / a > , nx);< / div >
< div class = "line" > < a name = "l00166" > < / a > < span class = "lineno" > 166< / span >   < / div >
< div class = "line" > < a name = "l00167" > < / a > < span class = "lineno" > 167< / span >   < span class = "keywordflow" > if< / span > (verbose) {< / div >
< div class = "line" > < a name = "l00168" > < / a > < span class = "lineno" > 168< / span >   printf (< span class = "stringliteral" > " Iteration %d (%.2f s, search %.2f s): " < / span > < / div >
< div class = "line" > < a name = "l00169" > < / a > < span class = "lineno" > 169< / span >   < span class = "stringliteral" > " objective=%g imbalance=%.3f nsplit=%d \r" < / span > ,< / div >
< div class = "line" > < a name = "l00170" > < / a > < span class = "lineno" > 170< / span >   i, (< a class = "code" href = "namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb" > getmillisecs< / a > () - t0) / 1000.0,< / div >
< div class = "line" > < a name = "l00171" > < / a > < span class = "lineno" > 171< / span >   t_search_tot / 1000,< / div >
< div class = "line" > < a name = "l00172" > < / a > < span class = "lineno" > 172< / span >   err, imbalance_factor (nx, k, assign),< / div >
< div class = "line" > < a name = "l00173" > < / a > < span class = "lineno" > 173< / span >   nsplit);< / div >
< div class = "line" > < a name = "l00174" > < / a > < span class = "lineno" > 174< / span >   fflush (stdout);< / div >
< div class = "line" > < a name = "l00175" > < / a > < span class = "lineno" > 175< / span >   }< / div >
< div class = "line" > < a name = "l00176" > < / a > < span class = "lineno" > 176< / span >   < / div >
< div class = "line" > < a name = "l00177" > < / a > < span class = "lineno" > 177< / span >   < span class = "keywordflow" > if< / span > (< a class = "code" href = "structfaiss_1_1ClusteringParameters.html#ad997fb511f574f7ddc69938c21612f8d" > spherical< / a > )< / div >
< div class = "line" > < a name = "l00178" > < / a > < span class = "lineno" > 178< / span >   fvec_renorm_L2 (d, k, cur_centroids.data());< / div >
< div class = "line" > < a name = "l00179" > < / a > < span class = "lineno" > 179< / span >   < / div >
< div class = "line" > < a name = "l00180" > < / a > < span class = "lineno" > 180< / span >   index.< a class = "code" href = "structfaiss_1_1Index.html#a849361f5f0ab0aba8d419c86f2594191" > reset< / a > ();< / div >
< div class = "line" > < a name = "l00181" > < / a > < span class = "lineno" > 181< / span >   < span class = "keywordflow" > if< / span > (< a class = "code" href = "structfaiss_1_1ClusteringParameters.html#a27d6192097920fa981cff0acedfaac91" > update_index< / a > )< / div >
< div class = "line" > < a name = "l00182" > < / a > < span class = "lineno" > 182< / span >   index.< a class = "code" href = "structfaiss_1_1Index.html#a8f67dfd73993e192dc78f2c93d9d9532" > train< / a > (k, cur_centroids.data());< / div >
< div class = "line" > < a name = "l00183" > < / a > < span class = "lineno" > 183< / span >   < / div >
< div class = "line" > < a name = "l00184" > < / a > < span class = "lineno" > 184< / span >   assert (index.< a class = "code" href = "structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd" > ntotal< / a > == 0);< / div >
< div class = "line" > < a name = "l00185" > < / a > < span class = "lineno" > 185< / span >   index.< a class = "code" href = "structfaiss_1_1Index.html#a1b5e9ac70adbce0897dd6c8276ad96f2" > add< / a > (k, cur_centroids.data());< / div >
< div class = "line" > < a name = "l00186" > < / a > < span class = "lineno" > 186< / span >   }< / div >
< div class = "line" > < a name = "l00187" > < / a > < span class = "lineno" > 187< / span >   < span class = "keywordflow" > if< / span > (verbose) printf(< span class = "stringliteral" > " \n" < / span > );< / div >
< div class = "line" > < a name = "l00188" > < / a > < span class = "lineno" > 188< / span >   < span class = "keywordflow" > if< / span > (nredo > 1) {< / div >
< div class = "line" > < a name = "l00189" > < / a > < span class = "lineno" > 189< / span >   < span class = "keywordflow" > if< / span > (err < best_err) {< / div >
< div class = "line" > < a name = "l00190" > < / a > < span class = "lineno" > 190< / span >   < span class = "keywordflow" > if< / span > (verbose)< / div >
< div class = "line" > < a name = "l00191" > < / a > < span class = "lineno" > 191< / span >   printf (< span class = "stringliteral" > " Objective improved: keep new clusters\n" < / span > );< / div >
< div class = "line" > < a name = "l00192" > < / a > < span class = "lineno" > 192< / span >   < a class = "code" href = "structfaiss_1_1Clustering.html#a64c5ec0b4a7967d8be2872974b455ff1" > centroids< / a > = buf_centroids;< / div >
< div class = "line" > < a name = "l00193" > < / a > < span class = "lineno" > 193< / span >   best_err = err;< / div >
< div class = "line" > < a name = "l00194" > < / a > < span class = "lineno" > 194< / span >   }< / div >
< div class = "line" > < a name = "l00195" > < / a > < span class = "lineno" > 195< / span >   index.< a class = "code" href = "structfaiss_1_1Index.html#a849361f5f0ab0aba8d419c86f2594191" > reset< / a > ();< / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l00196" > < / a > < span class = "lineno" > 196< / span >   }< / div >
< div class = "line" > < a name = "l00197" > < / a > < span class = "lineno" > 197< / span >   }< / div >
< div class = "line" > < a name = "l00198" > < / a > < span class = "lineno" > 198< / span >   < / div >
< div class = "line" > < a name = "l00199" > < / a > < span class = "lineno" > 199< / span >   < span class = "keyword" > delete< / span > [] assign;< / div >
< div class = "line" > < a name = "l00200" > < / a > < span class = "lineno" > 200< / span >   < span class = "keyword" > delete< / span > [] dis;< / div >
< div class = "line" > < a name = "l00201" > < / a > < span class = "lineno" > 201< / span >   < span class = "keywordflow" > if< / span > (x_in != x) < span class = "keyword" > delete< / span > [] x;< / div >
< div class = "line" > < a name = "l00202" > < / a > < span class = "lineno" > 202< / span >   }< / div >
< div class = "line" > < a name = "l00203" > < / a > < span class = "lineno" > 203< / span >   < / div >
< div class = "line" > < a name = "l00204" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a38bd0dde8a1b229201a5fcb64d05daa6" > 204< / a > < / span >   < span class = "keywordtype" > float< / span > < a class = "code" href = "namespacefaiss.html#a38bd0dde8a1b229201a5fcb64d05daa6" > kmeans_clustering< / a > (< span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > n, < span class = "keywordtype" > size_t< / span > k,< / div >
< div class = "line" > < a name = "l00205" > < / a > < span class = "lineno" > 205< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *x,< / div >
< div class = "line" > < a name = "l00206" > < / a > < span class = "lineno" > 206< / span >   < span class = "keywordtype" > float< / span > *centroids)< / div >
< div class = "line" > < a name = "l00207" > < / a > < span class = "lineno" > 207< / span >   {< / div >
< div class = "line" > < a name = "l00208" > < / a > < span class = "lineno" > 208< / span >   < a class = "code" href = "structfaiss_1_1Clustering.html" > Clustering< / a > clus (d, k);< / div >
< div class = "line" > < a name = "l00209" > < / a > < span class = "lineno" > 209< / span >   clus.verbose = d * n * k > (1L < < 30);< / div >
< div class = "line" > < a name = "l00210" > < / a > < span class = "lineno" > 210< / span >   < span class = "comment" > // display logs if > 1Gflop per iteration< / span > < / div >
< div class = "line" > < a name = "l00211" > < / a > < span class = "lineno" > 211< / span >   < a class = "code" href = "structfaiss_1_1IndexFlatL2.html" > IndexFlatL2< / a > index (d);< / div >
< div class = "line" > < a name = "l00212" > < / a > < span class = "lineno" > 212< / span >   clus.< a class = "code" href = "structfaiss_1_1Clustering.html#a839f210abb11c7a1c7162e336e0ff9cf" > train< / a > (n, x, index);< / div >
< div class = "line" > < a name = "l00213" > < / a > < span class = "lineno" > 213< / span >   memcpy(centroids, clus.< a class = "code" href = "structfaiss_1_1Clustering.html#a64c5ec0b4a7967d8be2872974b455ff1" > centroids< / a > .data(), < span class = "keyword" > sizeof< / span > (*centroids) * d * k);< / div >
< div class = "line" > < a name = "l00214" > < / a > < span class = "lineno" > 214< / span >   < span class = "keywordflow" > return< / span > clus.< a class = "code" href = "structfaiss_1_1Clustering.html#a91e32da946477bb751706a68c5cd3327" > obj< / a > .back();< / div >
< div class = "line" > < a name = "l00215" > < / a > < span class = "lineno" > 215< / span >   }< / div >
< div class = "line" > < a name = "l00216" > < / a > < span class = "lineno" > 216< / span >   < / div >
< div class = "line" > < a name = "l00217" > < / a > < span class = "lineno" > 217< / span >   } < span class = "comment" > // namespace faiss< / span > < / div >
< div class = "ttc" id = "structfaiss_1_1ClusteringParameters_html_a5c7c6f05c75e1668befdb3be148fd5f9" > < div class = "ttname" > < a href = "structfaiss_1_1ClusteringParameters.html#a5c7c6f05c75e1668befdb3be148fd5f9" > faiss::ClusteringParameters::niter< / a > < / div > < div class = "ttdeci" > int niter< / div > < div class = "ttdoc" > clustering iterations < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8h_source.html#l00026" > Clustering.h:26< / a > < / div > < / div >
2017-02-25 00:32:08 +08:00
< div class = "ttc" id = "namespacefaiss_html_ad1cfbe51f2d77dc5094e0140f5955165" > < div class = "ttname" > < a href = "namespacefaiss.html#ad1cfbe51f2d77dc5094e0140f5955165" > faiss::km_update_centroids< / a > < / div > < div class = "ttdeci" > int km_update_centroids(const float *x, float *centroids, long *assign, size_t d, size_t k, size_t n)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01286" > utils.cpp:1286< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
< div class = "ttc" id = "structfaiss_1_1ClusteringParameters_html_a11a049c40c376c57ac6cc3b8d5d1d58b" > < div class = "ttname" > < a href = "structfaiss_1_1ClusteringParameters.html#a11a049c40c376c57ac6cc3b8d5d1d58b" > faiss::ClusteringParameters::nredo< / a > < / div > < div class = "ttdeci" > int nredo< / div > < div class = "ttdoc" > redo clustering this many times and keep best < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8h_source.html#l00027" > Clustering.h:27< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1ClusteringParameters_html_a86c8802261041f5d49b1a0d296da60be" > < div class = "ttname" > < a href = "structfaiss_1_1ClusteringParameters.html#a86c8802261041f5d49b1a0d296da60be" > faiss::ClusteringParameters::ClusteringParameters< / a > < / div > < div class = "ttdeci" > ClusteringParameters()< / div > < div class = "ttdoc" > sets reasonable defaults < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8cpp_source.html#l00028" > Clustering.cpp:28< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1Index_html_a849361f5f0ab0aba8d419c86f2594191" > < div class = "ttname" > < a href = "structfaiss_1_1Index.html#a849361f5f0ab0aba8d419c86f2594191" > faiss::Index::reset< / a > < / div > < div class = "ttdeci" > virtual void reset()=0< / div > < div class = "ttdoc" > removes all elements from the database. < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1IndexFlatL2_html" > < div class = "ttname" > < a href = "structfaiss_1_1IndexFlatL2.html" > faiss::IndexFlatL2< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "IndexFlat_8h_source.html#l00081" > IndexFlat.h:81< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1Clustering_html_a2fa90a2681dc42faaf2435e63a5ae9b4" > < div class = "ttname" > < a href = "structfaiss_1_1Clustering.html#a2fa90a2681dc42faaf2435e63a5ae9b4" > faiss::Clustering::Clustering< / a > < / div > < div class = "ttdeci" > Clustering(int d, int k)< / div > < div class = "ttdoc" > the only mandatory parameters are k and d < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8cpp_source.html#l00040" > Clustering.cpp:40< / a > < / div > < / div >
2017-03-21 01:33:21 +08:00
< div class = "ttc" id = "structfaiss_1_1Clustering_html_a87581785d9516c683bbc7c9392bfa993" > < div class = "ttname" > < a href = "structfaiss_1_1Clustering.html#a87581785d9516c683bbc7c9392bfa993" > faiss::Clustering::k< / a > < / div > < div class = "ttdeci" > size_t k< / div > < div class = "ttdoc" > nb of centroids < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8h_source.html#l00060" > Clustering.h:60< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1ClusteringParameters_html_a509c65e2ebe6ecabebd163ecb03c5579" > < div class = "ttname" > < a href = "structfaiss_1_1ClusteringParameters.html#a509c65e2ebe6ecabebd163ecb03c5579" > faiss::ClusteringParameters::seed< / a > < / div > < div class = "ttdeci" > int seed< / div > < div class = "ttdoc" > seed for the random number generator < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8h_source.html#l00036" > Clustering.h:36< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1ClusteringParameters_html_a5af907901147a9b1e748b13305839924" > < div class = "ttname" > < a href = "structfaiss_1_1ClusteringParameters.html#a5af907901147a9b1e748b13305839924" > faiss::ClusteringParameters::min_points_per_centroid< / a > < / div > < div class = "ttdeci" > int min_points_per_centroid< / div > < div class = "ttdoc" > otherwise you get a warning < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8h_source.html#l00033" > Clustering.h:33< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1Clustering_html" > < div class = "ttname" > < a href = "structfaiss_1_1Clustering.html" > faiss::Clustering< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8h_source.html#l00057" > Clustering.h:57< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
< div class = "ttc" id = "structfaiss_1_1Index_html_a1b5e9ac70adbce0897dd6c8276ad96f2" > < div class = "ttname" > < a href = "structfaiss_1_1Index.html#a1b5e9ac70adbce0897dd6c8276ad96f2" > faiss::Index::add< / a > < / div > < div class = "ttdeci" > virtual void add(idx_t n, const float *x)=0< / div > < / div >
2017-03-21 01:33:21 +08:00
< div class = "ttc" id = "structfaiss_1_1Clustering_html_a91e32da946477bb751706a68c5cd3327" > < div class = "ttname" > < a href = "structfaiss_1_1Clustering.html#a91e32da946477bb751706a68c5cd3327" > faiss::Clustering::obj< / a > < / div > < div class = "ttdeci" > std::vector< float > obj< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8h_source.html#l00067" > Clustering.h:67< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
< div class = "ttc" id = "namespacefaiss_html_a38bd0dde8a1b229201a5fcb64d05daa6" > < div class = "ttname" > < a href = "namespacefaiss.html#a38bd0dde8a1b229201a5fcb64d05daa6" > faiss::kmeans_clustering< / a > < / div > < div class = "ttdeci" > float kmeans_clustering(size_t d, size_t n, size_t k, const float *x, float *centroids)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8cpp_source.html#l00204" > Clustering.cpp:204< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1Index_html_a6970683faa021b7a6f1a0865c0d4eccd" > < div class = "ttname" > < a href = "structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd" > faiss::Index::ntotal< / a > < / div > < div class = "ttdeci" > idx_t ntotal< / div > < div class = "ttdoc" > total nb of indexed vectors < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Index_8h_source.html#l00067" > Index.h:67< / a > < / div > < / div >
2017-02-25 00:32:08 +08:00
< div class = "ttc" id = "namespacefaiss_html_af2a71f7d5402ae02ce169a4cc83020eb" > < div class = "ttname" > < a href = "namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb" > faiss::getmillisecs< / a > < / div > < div class = "ttdeci" > double getmillisecs()< / div > < div class = "ttdoc" > ms elapsed since some arbitrary epoch < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l00071" > utils.cpp:71< / a > < / div > < / div >
2017-03-21 01:33:21 +08:00
< div class = "ttc" id = "structfaiss_1_1Clustering_html_a64c5ec0b4a7967d8be2872974b455ff1" > < div class = "ttname" > < a href = "structfaiss_1_1Clustering.html#a64c5ec0b4a7967d8be2872974b455ff1" > faiss::Clustering::centroids< / a > < / div > < div class = "ttdeci" > std::vector< float > centroids< / div > < div class = "ttdoc" > centroids (k * d) < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8h_source.html#l00063" > Clustering.h:63< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1Clustering_html_afbf6efacae54c58586b75ed790facd74" > < div class = "ttname" > < a href = "structfaiss_1_1Clustering.html#afbf6efacae54c58586b75ed790facd74" > faiss::Clustering::d< / a > < / div > < div class = "ttdeci" > size_t d< / div > < div class = "ttdoc" > dimension of the vectors < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8h_source.html#l00059" > Clustering.h:59< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
< div class = "ttc" id = "structfaiss_1_1Index_html_aced51b1ebc33c47ab3ae15ea906559a7" > < div class = "ttname" > < a href = "structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7" > faiss::Index::search< / a > < / div > < div class = "ttdeci" > virtual void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const =0< / div > < / div >
2017-03-21 01:33:21 +08:00
< div class = "ttc" id = "structfaiss_1_1ClusteringParameters_html_a27d6192097920fa981cff0acedfaac91" > < div class = "ttname" > < a href = "structfaiss_1_1ClusteringParameters.html#a27d6192097920fa981cff0acedfaac91" > faiss::ClusteringParameters::update_index< / a > < / div > < div class = "ttdeci" > bool update_index< / div > < div class = "ttdoc" > update index after each iteration? < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8h_source.html#l00031" > Clustering.h:31< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
< div class = "ttc" id = "structfaiss_1_1ClusteringParameters_html" > < div class = "ttname" > < a href = "structfaiss_1_1ClusteringParameters.html" > faiss::ClusteringParameters< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8h_source.html#l00025" > Clustering.h:25< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1Index_html" > < div class = "ttname" > < a href = "structfaiss_1_1Index.html" > faiss::Index< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Index_8h_source.html#l00061" > Index.h:61< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1Clustering_html_a839f210abb11c7a1c7162e336e0ff9cf" > < div class = "ttname" > < a href = "structfaiss_1_1Clustering.html#a839f210abb11c7a1c7162e336e0ff9cf" > faiss::Clustering::train< / a > < / div > < div class = "ttdeci" > virtual void train(idx_t n, const float *x, faiss::Index & index)< / div > < div class = "ttdoc" > Index is used during the assignment stage. < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8cpp_source.html#l00067" > Clustering.cpp:67< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1Index_html_a6e92732617c4dbe364e7678dd8773a7f" > < div class = "ttname" > < a href = "structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f" > faiss::Index::is_trained< / a > < / div > < div class = "ttdeci" > bool is_trained< / div > < div class = "ttdoc" > set if the Index does not require training, or if training is done already < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Index_8h_source.html#l00071" > Index.h:71< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1Index_html_a8f67dfd73993e192dc78f2c93d9d9532" > < div class = "ttname" > < a href = "structfaiss_1_1Index.html#a8f67dfd73993e192dc78f2c93d9d9532" > faiss::Index::train< / a > < / div > < div class = "ttdeci" > virtual void train(idx_t n, const float *x)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Index_8h_source.html#l00092" > Index.h:92< / a > < / div > < / div >
2017-03-21 01:33:21 +08:00
< div class = "ttc" id = "structfaiss_1_1ClusteringParameters_html_ad997fb511f574f7ddc69938c21612f8d" > < div class = "ttname" > < a href = "structfaiss_1_1ClusteringParameters.html#ad997fb511f574f7ddc69938c21612f8d" > faiss::ClusteringParameters::spherical< / a > < / div > < div class = "ttdeci" > bool spherical< / div > < div class = "ttdoc" > do we want normalized centroids? < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8h_source.html#l00030" > Clustering.h:30< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1ClusteringParameters_html_a993e0a035248faad6e292a5ef9af1953" > < div class = "ttname" > < a href = "structfaiss_1_1ClusteringParameters.html#a993e0a035248faad6e292a5ef9af1953" > faiss::ClusteringParameters::max_points_per_centroid< / a > < / div > < div class = "ttdeci" > int max_points_per_centroid< / div > < div class = "ttdoc" > to limit size of dataset < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Clustering_8h_source.html#l00034" > Clustering.h:34< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
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