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alcohol
2011 Apr 19
2
Several factors same levels
...is is probably very simple but I'm new to R so apologies for being stupid.
I have some data with No coded as 0 and yes coded as 1.
e.g.
id sex alcohol smoker
1 M 0 1
2 F 1 0
3 M 0 0
I realise I can covert the numerical variable back to a factor by
falcohol<-factor(alcohol,levels=0:1)
levels<-c("No","Yes")
fsmoker<-factor(smoker,levels=0:1)
levels<-c("No","Yes")
but can I do this for all factors using the same levels in a single command
to make it easier (i.e. switch all 0/1, no/yes variables with...