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clistr
2007 Dec 05
2
converting factors to dummy variables
Hi all -
I'm trying to find a way to create dummy variables from factors in a
regression. I have been using biglm along the lines of
ff <- log(Price) ~ factor(Colour):factor(Store) +
factor(DummyVar):factor(Colour):factor(Store)
lm1 <- biglm(ff, data=my.dataset)
but because there are lots of colours (>100) and lots of stores
(>250), I run it to memory problems. Now, not every