On 26.08.2012 15:33, Reza Salimi-Khorshidi wrote:
Thanks Uwe,
Am I right that in ksvm's internal cross-validation, there is no
guarantee for having *at least one* of each classes in each subset?
That is my guess, but I haven't read the code. Please read it yourself
in case you want more details - or ask the author of tht function.
Best,
Uwe Ligges
Some randomness is involved, and when you get an unfortunate
subsample (e.g. if in the internal cross-validation one class is not
selected at all) it won't work anymore.
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