使用deeplearntoolbox时出现以下错误。具体来说,在执行文件时test_example_DBN.m
??? Error: File: nneval.m Line: 18 Column: 17
Unbalanced or unexpected parenthesis or bracket.
Error in ==> nntrain at 66
loss = nneval(nn, loss, train_x, train_y);
Error in ==> test_example_DBN at 38
nn = nntrain(nn, train_x, train_y, opts);