(PECL fann >= 1.0.0)
fann_subset_train_data — ����һ��ѵ�������Ӽ��ĸ�����
$data
, int $pos
, int $length
) : resource����һ��ѵ�������Ӽ��ĸ��� resource, �� pos λ�ÿ�ʼ��ǰ���� length ��Ԫ�ء�
fann_subset_train_data(train_data, 0, fann_length_train_data(train_data)) �� fann_duplicate_train_data()������Ч����һ���ġ�
dataNeural network training data resource.
pos��ʼλ�á�
length����Ԫ�ص�������
Returns a train data resource on success, or FALSE on error.