Colleagues, I am sending this email again with a better description of my problem and the area where I need help.
I need help creating a string of variables that will be accepted by the dimnames function. The string needs to start with the dimnames j and k followed by a series of dimnames xxx1, . . . ., xxx2, . . ., xxxn. I create xxx1, xxx2 (not going to xxxn to shorten the code below) as a string using a for loop and the paste function. I then use a paste function, zzz <- paste("j","k",string) to create the full set of dimnames, j, k, xxx1, xxx2 as string. I create the matrix myvalues in the usual way and attempt to assign dim names to the matrix using the following dimnames statement, dimnames(myvalues)<-list(NULL,c(zzz)) The dimnames statement leads to the following error, Error in dimnames(x) <- dn : length of 'dimnames' [2] not equal to array extent A colnames statement, colnames(myvalues)<-as.character(zzz) produces the same error. Can someone tell me how to create a sting that can be used in the dimnames statment? Thank you (and please accept my apologies for double posting). John # create variable names xxx1 and xxx2. string="" for (j in 1:2){ name <- paste("xxx",j,sep="") string <- paste(string,name) print(string) } # Creation of xxx1 and xxx2 works string # Create matrix myvalues <- matrix(nrow=2,ncol=4) head(myvalues,1) # Add "j" and "k" to the string of column names zzz <- paste("j","k",string) zzz # assign column names, j, k, xxx1, xxx2 to the matrix # create column names, j, k, xxx1, xxx2. dimnames(myvalues)<-list(NULL,c(zzz)) colnames(myvalues) <- string ______________________________________________ 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.