TypeError: ufunc 'multiply' did not contain a loop with signature matching types dtype('S32')
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今天拿python写AdaBoost的时候碰到的，一看报错提示就知道是类型错误，后来参考了
http://hyry.dip.jp/tech/book/page/scipy/numpy_ndarray.html
得知S32就是 长度为32个字节的字符串类型，这下就好办了，发现问题是出在读取txt数据时没有转换类型，依旧保持着字符类型。
解决方案：
float()
2 0
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