Dear Ivan and Rui - thanks a lot for the effective help.
All best wishes Troels
Den 03-07-2024 kl. 10:25 skrev Ivan Krylov:
В Wed, 3 Jul 2024 10:13:59 +0200
Troels Ring <tr...@gvdnet.dk> пишет:
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?
get(e) will return the value of the variable with the name stored in
the variable e.
A more idiomatic variant will require more changes:
1. Create the "adds" variable as a list, so that it could contain other
arbitrary R values:
adds <- list()
2. Instead of assigning adds1 <- something(), adds2 <-
something_else(), ..., assign to the elements of the list:
adds[[1]] <- something()
adds[[2]] <- something_else()
...
3. Now you can use the same syntax to access the elements of the list:
SS[i] <- sum(adds[[i]])
As a bonus, you can use the "apply" family of R functions that will
perform the loop for you: instead of SS <- c(); for (i in 1:11) SS[i]
<- sum(adds[[i]]) you can write
SS <- vapply(adds, sum, numeric(1))
...and it will perform the same loop inside it, verifying each time
that sum(adds[[i]]) returns a single number.
______________________________________________
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.
