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poids
2011 Nov 03
2
optimising a loop
...9;m stock and I can't find a good way to do it. Hopefully one of you will have something clever to propose.
Here is a simplified example:
I have a squared matrix:
> nom.plac2 <- c("102", "103", "301", "303","304", "403")
> poids2 <- matrix(NA, 6,6, dimnames=list(nom.plac2,nom.plac2))
> poids2
102 103 301 303 304 403
102 NA NA NA NA NA NA
103 NA NA NA NA NA NA
301 NA NA NA NA NA NA
303 NA NA NA NA NA NA
304 NA NA NA NA NA NA
403 NA NA NA NA NA NA
I want to replace some of the NA...