scikit-learn/scikit-learn — pull request #3924 by banilo (2014-12-01 16:25:30+00:00)
Title: [ENH] SparsePCA: added inverse_transform()

In sklearn.decomposition, TruncatedSVD, PCA, RandomizedPCA, and KernelPCA all have an inverse_transform() method, but not SparsePCA.