Às 09:13 de 03/07/2024, Troels Ring escreveu:
Hi friends - I'm in problems finding out how to unquote - I have a
series of vectors named adds1....adds11 and need to e.g. find the sum of
each of them
So I try
SS <- c()
for (i in 1:11) {
e <- paste("adds",i,sep="")
SS[i] <- sum(xx(e)) }
Now e looks right - but I have been unable to find out how to get the
string e converted to the proper argument for sum() - i.e. what is
function xx?
All best wishes
Troels Ring, Aalborg, Denmark
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Hello,
Function xx is ?get or mget (same help page).
You can get the vectors adds all in one instruction with mget or one at
a time with get.
adds1 <- 1:10
adds2 <- 2:10
adds3 <- 3:10
adds4 <- 4:10
adds5 <- 5:10
# create SS with the required length beforehand
SS <- numeric(5L)
for (i in 1:5) {
e <- paste("adds",i,sep="")
SS[i] <- sum(get(e))
}
SS
#> [1] 55 54 52 49 45
Or all in one instruction with the assistance of ?ls.
# ls(pattern = "^adds") |> mget() |> lapply(sum)
ls(pattern = "^adds") |> mget() |> sapply(sum)
#> adds1 adds2 adds3 adds4 adds5
#> 55 54 52 49 45
Hope this helps,
Rui Barradas
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R-help@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.
