Hi, Following expression returns only the first element ifelse(T, c(1,2,3), c(5,6)) However I am looking for some one-liner expression like above which will return the entire vector. Is there any way to achieve this?
how about if(T) c(1,2,3) else c(5,6) ? On 2023-10-12 4:22 p.m., Christofer Bogaso wrote:> Hi, > > Following expression returns only the first element > > ifelse(T, c(1,2,3), c(5,6)) > > However I am looking for some one-liner expression like above which > will return the entire vector. > > Is there any way to achieve this? > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.
What a strange question... ifelse returns a vector (all data in R is vectors... some have length 1, but length zero is also possible, as are longer vectors) that is exactly as long as the logical vector that you give it, filled with elements from the respective positions in the vectors supplied in the second and third arguments. Because your logical vector is length 1, you only get a vector with the first element of the second argument. If you want to choose between one of two vectors considered wholly, then "if" is what you need: result <- if (TRUE) c(1,2,3) else c(5,6) On October 12, 2023 1:22:03 PM PDT, Christofer Bogaso <bogaso.christofer at gmail.com> wrote:>Hi, > >Following expression returns only the first element > >ifelse(T, c(1,2,3), c(5,6)) > >However I am looking for some one-liner expression like above which >will return the entire vector. > >Is there any way to achieve this? > >______________________________________________ >R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >https://stat.ethz.ch/mailman/listinfo/r-help >PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >and provide commented, minimal, self-contained, reproducible code.-- Sent from my phone. Please excuse my brevity.
?s 21:22 de 12/10/2023, Christofer Bogaso escreveu:> Hi, > > Following expression returns only the first element > > ifelse(T, c(1,2,3), c(5,6)) > > However I am looking for some one-liner expression like above which > will return the entire vector. > > Is there any way to achieve this? > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.Hello, I don't like it but ifelse(rep(T, length(c(1,2,3))), c(1,2,3), c(5,6)) maybe you should use max(length(c(1, 2, 3)), length(5, 6))) instead, but it's still ugly. Hope this helps, Rui Barradas -- Este e-mail foi analisado pelo software antiv?rus AVG para verificar a presen?a de v?rus. www.avg.com
?ifelse
'ifelse' returns a value with the same shape as 'test' which is
filled with elements selected from either 'yes' or 'no'
depending
on whether the element of 'test' is 'TRUE' or
'FALSE'.
This is actually rather startling, because elsewhere in the
S (R) language, operands are normally replicated to the length
of the longer. Thus
c(1,2,3)*10 + c(5,6)
first (notionally) replicates 10 to c(10,10,10)
and then c(5,6) to c(5,6,5), yielding c(15,26,35).
And this *does* happen, sort of.> ifelse(c(F,T,F), c(1,2,3), c(5,6))
=> 5 2 5.
But it *doesn't* apply to the test.
There's another surprise. Years ago I expected that
all three arguments would be evaluated, then length
adjusted, and then processing would be done.
But the 2nd argument is evaluated (in full) if and only
if some element of the test is true,
and the 3rd argument is evaluated (in full) if and oly
if some element of the test is false.
ifelse(c(NA,NA), stop("true"), stop("false"))
=> c(NA,NA).
At any rate, what you want is if (<test>) <tp> else <fp>
On Fri, 13 Oct 2023 at 09:22, Christofer Bogaso <bogaso.christofer at
gmail.com>
wrote:
> Hi,
>
> Following expression returns only the first element
>
> ifelse(T, c(1,2,3), c(5,6))
>
> However I am looking for some one-liner expression like above which
> will return the entire vector.
>
> Is there any way to achieve this?
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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