See downloadFile() of the R.utils package (on CRAN); it allows you to download to a file to a given path (without have to "replicate" the filename), and it also have an option (the default) to drop zero-size files that are (sometimes) created when download.file() tries to download a non-existing file. Moreover, the method downloads files in binary mode by default (download in text mode is a common cause for "corrupt" files). See help("downloadFile", package="R.utils") for more bells and whistles.
/Henrik On Tue, Nov 8, 2011 at 3:32 PM, Mary Kindall <mary.kind...@gmail.com> wrote: > I am downloading say 100 files from ucsc website and storing it into dest > folder. > download.file function create a file in destination folder even if the file > is not present which is something I dont want. > So I wrote if condition to remove the file if the download function has non > zero value. > > Now it exits when there is an error or file not present. How can I use > "try" and "if" condition together so that the program does not exit on > error and delete the created file in destination folder. > > for (i in 1: 100) > { > fileUrl = ucscfilenames[i] > if (download.file(fileUrl, destFile, 'wget' , quiet = TRUE) != 0) > { > file.remove(destFile) > } > } > > > > thanks > > -- > ------------- > Mary Kindall > Yorktown Heights, NY > USA > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > ______________________________________________ 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.