InvalidArgumentError (see above for traceback): Matrix size-incompatible: In[0]: [5,1], In[1]: [50,5]
         [[Node: metrics/kappa/MatMul = MatMul[T=DT_FLOAT, transpose_a=false, transpose_b=false, _device="/job:localhost/replica:0/task:0/gpu:0"](metrics/kappa/transpose, _arg_dense_2_target_0_1/_11)]]
         [[Node: metrics/kappa/Mean/_51 = _Recv[client_terminated=false, recv_device="/job:localhost/replica:0/task:0/cpu:0", send_device="/job:localhost/replica:0/task:0/gpu:0", send_device_incarnation=1, tensor_name="edge_2016_metrics/kappa/Mean", tensor_type=DT_FLOAT, _device="/job:localhost/replica:0/task:0/cpu:0"]()]]