Displaying 2 results from an estimated 2 matches for "mat_bool".
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mat_bools
2024 May 03
2
Get a copy of a matrix only for TRUE entries of a matching size boolean matrix?
...of a matrix only for TRUE entries of a
matching size boolean matrix? For *example*:
> mat_letters <- matrix(data=c('A', 'B', 'C', 'D'), ncol=2, byrow=TRUE)
> mat_letters
[,1] [,2]
[1,] "A" "B"
[2,] "C" "D"
> mat_bools <- matrix(data=c(FALSE, TRUE, TRUE, FALSE), ncol=2, byrow=TRUE)
> mat_bools
[,1] [,2]
[1,] FALSE TRUE
[2,] TRUE FALSE
*Reminder:* The following is only an example ; the solution might look very
different.
some_command(mat_letters, mat_bools, false=empty)
[,1] [,2]
[1,] "&q...
2024 May 03
1
Get a copy of a matrix only for TRUE entries of a matching size boolean matrix?
...time on it.
Bonne fin de journ?e de Montr?al (nous sommes le matin ici)
On Fri, May 3, 2024 at 10:30?AM Marc Girondot <marc_grt at yahoo.fr> wrote:
> Is it what you want ?
> mat_letters <- matrix(data=c('A', 'B', 'C', 'D'), ncol=2, byrow=TRUE)
> mat_bools <- matrix(data=c(FALSE, TRUE, TRUE, FALSE), ncol=2, byrow=TRUE)
>
> ifelse(mat_bools, mat_letters, "")
> ifelse(mat_bools, mat_letters, NA)
>
> > ifelse(mat_bools, mat_letters, "")
> [,1] [,2]
> [1,] "" "B"
> [2,] "C...