基于gaot工具箱优化BP以实现数据拟合。在nninit.m中修改数据存储的路径以及隐含层节点数的设置（S1），遗传算法与bp的参数修改在ga_bp.m中进行。-Toolbox gaot Optimize based on BP in order to achieve data fitting. At nninit.m modify the path of data storage as well as the hidden layer nodes of the set (S1), genetic algorithm and modify the parameters bp at ga_bp.m conducted.