Hi,
if I know the colnames x and y in the following example, I can easily to do lm.
tmp <- data.frame(x=c(1,1.2),y=c(1,2))
lm(y ~ x, data=tmp)
when the colnames are variable, what should I do? for example
colnames(tmp)[1] <- paste("aa",1,sep="_")
lm(y ~ paste("aa",1,sep="_"), data = tmp)
it gives me error.
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