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Old 01-17-2013, 09:08 AM
Anne Paulson Anne Paulson is offline
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Join Date: Jan 2013
Location: Silicon Valley
Posts: 52
Default Re: Regression then PLA

I'm coming up against this as well. Maybe I have a bug, but I'm finding that even though the regression finds an almost perfect line with, usually, very few points misclassified, I give the weights from the regression to PLA as initial weights and the PLA line bounces all over the place before settling down.

Scaling the regression weights up by a factor of 10 or 100 would speed up the PLA a lot, I think, by preventing the PLA update from moving the weights so much. That would have a similar effect to using a small alpha. But we're not supposed to do either thing, right?
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