bp神经网络分两类.首先在savedata.m里将两类数据分别标记为1和2，然后在nncw.m里将load数据训练，最后在test里load新数据测试。-bp neural network divided into two categories. First, there will be two types of data in savedata.m are labeled 1 and 2, and then load the data in nncw.m in the training, th