[R] [External] Subset command

[Steven Yen]

Great. Thanks!

On 2021/10/16 上午 09:38, Richard M. Heiberger wrote:
> the second  command doesn't tell R that the variables are in the data.frame mydata.
>
> you will need
> exclude <- with(mydata,
>                           prim==-9 | etc)
>
> also you will need logical negation !
> not arithmetic negation -
>
>> -c(TRUE,FALSE)
> [1] -1  0
>> as.logical(-c(TRUE,FALSE))
> [1]  TRUE FALSE
>
>> !c(TRUE,FALSE)
> [1] FALSE  TRUE
>
>
>
>> On Oct 15, 2021, at 21:23, 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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