> I agree on that point, thus the comment to launch a discussion about it. The
> question is: should we keep components_ or components_img_ ? As said before,
> I'm +1 for components_img_ (niimg in, niimg out).

For internals, we need components_ (for instance to get MultiPCA to talk
to ICA, or for the transform), so I am +1 to keep components_ rather than
components_img_

We should instruct people to use
multi_pca.masker_.inverse_transform(multi_pca.components_)