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namestub1
2012 Nov 14
1
R wildcards, sapply and as.factor
I want to change the type to factor of all variables in a data frame whose names match a certain pattern.
So here I am trying to change the type to factor of all variables whose name begins with?namestub?in the dataframe?df.
attach(df)sapply(grep(glob2rx("namestub*"),names(df)),as.factor)
But this doesn't work since
>levels(df$namestub1)NULL