Hi
r-help-boun...@r-project.org napsal dne 05.05.2010 07:49:25:
>
> Hi,
>
> I have a data frame where 1 variable is a factor with only 1 level. I
need
> the data frame structure to reflect that there are 2 levels for this
factor,
> even though this is not the case. I am currently adding extra 'fake'
rows
> to the data frame to ensure that 2 levels are present, but this is
slowing
> processing time in a loop quite a bit. Can I manually specify that this
> factor variable has two levels (even though this is lying to R)?
Not at all lying. That is why hated factors are useful. Lust add all
desired levels.
> ff<-factor("M")
> ff
[1] M
Levels: M
> levels(ff)<-c("M","F")
> ff
[1] M
Levels: M F
Regards
Petr
> Thanks,Seth
> --
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> trick-data-frame-structure-tp2130470p2130470.html
> Sent from the R help mailing list archive at Nabble.com.
>
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