[R] Subset command

[Bert Gunter]

I assume that prim, etc. are columns of your data frame, mydata. Ergo, the
error message "prim not found" as 'prim' etc. does not exist in the Global
environment.

exclude <- with(mydata, prim == -9, etc. ) should get what you want to
evaluate your second subset statement if I have understood correctly, as it
will look for those names within mydata.

Bert Gunter

"The trouble with having an open mind is that people keep coming along and
sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )


On Fri, Oct 15, 2021 at 6:24 PM Steven Yen <styen using ntu.edu.tw> wrote:

> The following "subset command works. I was hoping the second would as
> well but it does not.
>
> My definition of exclude is rejected.
>
> Help please? Thanks.
>
>  > mydata<-subset(mydata,
> +                prim>-9     & highsch>-9  & tert>-9 &
> +                govt>-9     & nongovt>-9  &
> +                married>-9  & urban>-9    &
> +                smhmyes>-9  & smhmno>-9   & smhmnoru>-9 &
> +                workouts>-9 & seconhan>-9 & reliyes>-9)
>
>  > exclude<-      prim==-9     | highsch==-9  | tert==-9 |
> +                govt==-9     | nongovt==-9  |
> +                married==-9  | urban==-9    |
> +                smhmyes==-9  | smhmno==-9   | smhmnoru==-9 |
> +                workouts==-9 | seconhan==-9 | reliyes==-9
> Error: object 'prim' not found
>  > mydata<-subset(mydata,-exclude)
> Error in eval(e, x, parent.frame()) : object 'exclude' not found
>  >
>
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