preprocess.py 文件源码

def __call__(self, data):
        if data.domain != self.pca.pre_domain:
            data = data.from_table(self.pca.pre_domain, data)
        pca_space = self.pca.transform(data.X)
        if self.components is not None:
            #set unused components to zero
            remove = np.ones(pca_space.shape[1])
            remove[self.components] = 0
            remove = np.extract(remove, np.arange(pca_space.shape[1]))
            pca_space[:,remove] = 0
        return self.pca.proj.inverse_transform(pca_space)