someProblem in R-1.4.1
vito muggeo wrote:
Hi all, This seems a very strange problem, but I'm running R-1.4.1 so, probably it has been solved in the 1.5.0 version (unfortunatly I can neither download the new version nor see the archive). Assignement of column names in a matrix, works just after editing it:
M<-matrix(0,10,5)
dimnames(M)[[2]]<-c("a","m","m","m","m") #say
Error: more elements supplied than there are to replace
fix(M)
dimnames(M)[[2]]<-c("a","m","m","m","m") #works
During fix()-ing the matrix got column names, and dimnames() got a list
of two elements (it was not before!).
Please read ?dimnames. The *second* example is not documented to work.
You can always assign names as described on the help page:
dimnames(M) <- list(NULL, c("a","m","m","m","m"))
Or just use
colnames(M) <- c("a","m","m","m","m")
Furthermore the following problem also seems related:
nr<-20
M<-matrix(0,nr,5)
for(i in 1:nr){
........some functions.........
M[i,]<-c(....) #5-dimensional vector
}
It works until to i=10 and then the following message appears:
Error in "[<-"(*tmp*, i, , value =c(......., :
number of items to replace is not a multiple of replacement
length
nr <- 20 M <- matrix(0, nr, 5) for(i in 1:nr) M[i,] <- 1:5 works for me. Can you provide an example?
This sound me very strange, because if some errors there are, it should not work also for i<=10. The loop perfectly works with nr=10 , but it doesn't so for nr=15, 30, for instance. Many thanks for your help best, vito
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