[R] problems with assign
Arnau Mir
arnau.mir at uib.es
Tue Apr 11 20:30:57 CEST 2006
Hello.
I have n files in a directory: file1, ..., filen.
I read them with the following commands:
list=scan(file="list",what=list(nom=""))
# in the file list, I have all the filenames.
n=length(list[[1]])
for (i in 1:n){
aux <- paste("p",i,sep="")
assign(aux, as.matrix(read.table(list[[1]][i])))
}
R creates the matrices p1,p2,...,pn.
I want to manipulate the matrices p1,...,pn and create new matrices
pp1,...,ppn. The dimensions of matrices ppi must be 100x100.
So, I do the following:
for (i in 1:n){
aux2 <- paste("pp",i,sep="")
assign(aux2, array(0,dim=c(100,100)))
}
My question is the following:
I want to assign to the matrix ppi[1,1] the value of pi[1,1] for i=1,...,n.
How can I do it?
For i=1, I try:
assign("aux2[1,1]",as.matrix(read.table(list[[1]][1]))[1,1])
but it doesn't work because if I ask R:
pp1[1,1]
R responses 0 but the value of p1[1,1] is not 0.
Thanks,
Arnau.
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