6-02-2012, 11:03 (-0800); Judith Flores escriu:
> The name of the column will be saved in an object called:
>
> variab
>
> the data frame is called df.
>
>
> If I try to the do following:
>
> df[variab]<-factor(df[variab], levels=c("A2B","B31","C33"))
>
> it won't work because df[variab] is a data frame.
I think you need to use df[[variab]] instead.
Cheers,
Ernest
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