scikit-learn/scikit-learn — pull request #573 by jansoe (2012-01-19 16:49:00+00:00)
Title: fix error in unwhitened case of ica

scaling of variance by samplesize should not be applied to prewhitened data because it belongs to the whitening itself
e.g. https://github.com/scikit-learn/scikit-learn/blob/master/sklearn/decomposition/pca.py#L213

see also my initial comment https://github.com/scikit-learn/scikit-learn/pull/243#issuecomment-1555860
(sorry that i did not brought this to an end)