这是一个matlab的bp网络程序，可用于逼近和预测，程序里有详细的说明与注释，包括数据预处理、建立网络、训练、仿真、预测的整个过程。-This is a matlab the bp network procedures, can be used for approximation and prediction, procedure, there are detailed instructions and notes, including data pre-processing, networking, training, simulation, prediction of the whole process.