我的錯誤的代碼是:train_labels = np_utils.to_categorical(train_labels,num_classes = 3)
錯誤的原因:
IndexError: index 2 is out of bounds for axis 1 with size 2
錯誤的具體指向:
categorical[np.arange(n), y] = 1
這是因為train_labels不是numpy.array的形式,需要把train_labels轉化為numpy數組的形式