Inline comment below.
Cheers,
Bert
Bert Gunter
"....
or, if stored as columns of a matrix or data frame X, e.g.,
##############
apply(X, 1, paste0)
##############
"
No. paste() is vectorized. apply() can be avoided:
df? <- data.frame(X1 = letters[1:3],
? ? ? ? ? ? ? ?? X2 = 5:7,
? ? ? ? ? ? ? ? ?X3 = LETTERS[1:3]
)
? X1 X2 X3
1 ?a ?5 ?A
2 ?b ?6 ?B
3 ?c ?7 ?C
[1] "a5A" "b6B" "c7C"
? Hth? --? Gerrit
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Am 17.02.2021 um 22:09 schrieb Parkhurst, David:
> If I have a vector of site abbreviations and a vector of depths
in those water bodies, is there a simple way in R to combine them to
make a third vector?
> Examples:
>
> site? depth? ? ? ? ? ?desired
> MU? ? 0? ? ? ? ? ? ? ?MU0
> MU? ? 1? ? ? ? ? ? ? ?MU1
> MU? ? 2? ? ? ? ? ? ? ?MU2
> MC? ? 0? ? ? ? ? ? ? ?MC0
> MC? ? 1? ? ? ? ? ? ? ?MC1
> MC? ? 2? ? ? ? ? ? ? ?MC2
>
> The dataset has many more lines than this.? I can see how to do
this with lots of if statements, but does R have magic that can make
it happen easily?? I guess this would be called concatenation.
>
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