Dear group, Here is an object:
z <- c("LSCPos100415.csv", "LSCPos100416.csv", "LSCPos100419.csv", "LSCPos100420.csv", "LSCPos100421.csv", "LSCPos100422.csv", "LSCPos100423.csv", "LSCPos100426.csv", "LSCPos100427.csv", "LSCPos100428.csv", "LSCPos100429.csv", "LSCPos100430.csv", "LSCPos100503.csv", "LSCPos100504.csv", "LSCPos100505.csv", "LSCPos100506.csv", "LSCPos100507.csv", "LSCPos100510.csv", "LSCPos100511.csv", "LSCPos100512.csv", "LSCPos100513.csv") I want to keep only the numeric part of each element. I thought using something like : >sub("REGEX","",y) I tried something with " \\D+", but it is not the final result I want > sub("\\D+","",y) [1] "100415.csv" "100416.csv" "100419.csv" "100420.csv" "100421.csv" "100422.csv" "100423.csv" "100426.csv" "100427.csv" "100428.csv" "100429.csv" "100430.csv" "100503.csv" "100504.csv" "100505.csv" [16] "100506.csv" "100507.csv" "100510.csv" "100511.csv" "100512.csv" "100513.csv" TY for help ______________________________________________ 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.