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BP神经网络原理及其Python实现

代码分为两个部分,其一是BP神经网络分类,其二是BP神经网络回归

分类

实例1

采用费雪鸢尾花卉数据作为测试数据集,150个样本数据,三类数据:分别是山鸢尾、变色鸢尾和维吉尼亚鸢尾。

数据集代码如下:

山鸢尾:0 变色鸢尾:1 维吉尼亚鸢尾:2

采用前120个作为训练样本,后30个作为测试样本

实例2

将豆瓣读书5个评分等级作为输入,总评分作为输出,利用5万本书进行训练,1万本书作为测试样本。

回归

拟合多项式

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