[R] Loc function in R??

[Dimitris Rizopoulos]

try:

which(X)


Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
      http://www.student.kuleuven.be/~m0390867/dimitris.htm


Quoting "Barb, Jennifer (NIH/CIT) [E]" <barbj at mail.nih.gov>:

> Does anyone know which function (if any) will return the index of the
> true locations in a Boolean vector?
>
>
>
> For instance:
>
> A=c(1,3,5,7,4);
>
> B=c(2,4,77,3,3);
>
> X=A<B;
>
>
>
> So X is:
>
>> X
>
> [1]  TRUE  TRUE  TRUE FALSE FALSE
>
>
>
> I'd like to know if there is a function that will tell me the locations
> of where the TRUE values are?  for instance a vector that will list that
> the locations are at 1, 2, 3.  This function is sometimes called loc()
> in other languages.
>
>
>
> Thanks,
>
> Jennifer
>
>
>
>
>
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>
> 	[[alternative HTML version deleted]]
>
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