fix loss function labels

run.py

@@ -54,7 +54,7 @@ parser.add_argument('--gpu-index', default=0, type=int, help='Gpu index.')
 
 def main():
     args = parser.parse_args()
-
+    assert args.n_views == 2, "Only two view training is supported."
     # check if gpu training is available
     if not args.disable_cuda and torch.cuda.is_available():
         args.device = torch.device('cuda')

simclr.py

@@ -55,9 +55,6 @@ class SimCLR(object):
         # select and combine multiple positives
         positives = similarity_matrix[labels.bool()].view(labels.shape[0], -1)
 
-        # if there is more than one potive (n_views >= 2) combine the multiple positives
-        positives = positives.mean(dim=1).unsqueeze(1)
-
         # select only the negatives the negatives
         negatives = similarity_matrix[~labels.bool()].view(similarity_matrix.shape[0], -1)