神经网络与Matlab，利用BP学习规则训练前向网络，使其完成函数逼近、矢量分类和模式识别，选择训练参数， 并指示如何进行训练-Neural network and Matlab, using BP learning rule before training the network to complete its function approximation, vector classification and pattern recognition, to select the training parameters and instructions on how to train