[EMAIL PROTECTED] wrote: > hello everybody, > > I have a directory with over 3000 files with different names. I would like > to make some vectors with the file names which are belong together. > > I'm trying to do it with a for loop in R: > > SF <- c("ad", "cd", "cer", "stress", "salty", "PC", "high", "transfer", > "cold", "heat") # the pattern to look for > names(SF) <- as.vector(SF) > for (i in 1:length(SF)){ > write(names(SF)[i], "") > for (j in 1:length(SF)) > {list[j] <- grep(names(SF)[j], list.files(),value=TRUE) > #character vector with the specified stress factor > } > } > > but all I'm getting is this > > Error in list[j] <- grep(names(SF)[j], list.files(), value = TRUE) : > object of type 'builtin' is not subsettable > > I would like the loop to make in each round a list of the files with the > pattern in the directory I'm looking in. > > what am i doing wrong? >
list is a built-in function. when you try list[i] (with or without assignment) without having introduced, within the scope, a subsettable object named 'list', you got a deserved error message. otherwise, you'd better use lapply than a for loop. vQ ______________________________________________ R-help@r-project.org mailing list 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.