The number of fail bits; means the number of output neurons which differ more than the bit fail limit (see fann_get_bit_fail_limit, fann_set_bit_fail_limit). The bits are counted in all of the training data, so this number can be higher than the number of training data.
This value is reset by fann_reset_MSE and updated by all the same functions which also updates the MSE value (e.g. fann_test_data, fann_train_epoch)
Neural network resource.
The number of bits fail, or false on error.