[pymvpa] Help needed untangling searchlight accuracy bias

[Yaroslav Halchenko]

On Thu, 20 Oct 2011, Mike E. Klein wrote:
> I wasn't getting that error… at the time of zscoring I hadn't yet
> removed category #3, so it was seeing -exactly- 3 samples per chunk.

aha... indeed... may be we should warn if number of samples per chunk <
some reasonable number, e.g. at least 5

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