That works # hydeUrls = vector of urls to file names #destList = vector of destination file names
for(files in 1:length(hydeUrls)){ filesFailed[files]<- FALSE filesFailed[files] <- tryCatch(download.file(url=hydeUrls[files],destfile=destList[files],quiet=FALSE,mode="wb"),warning=function(m) m<-TRUE) print(filesFailed[files]) } And below I get the result I want which has flagged this file as improperly downloaded. note the difference between the file length and the amount downloaded. trying URL 'ftp://ftp.mnp.nl/hyde/hyde31_final/1870ad_pop.zip'ftp data connection made, file length 14394402 bytesopened URLdownloaded 2.8 Mb [1] 1 And on successful download trying URL 'ftp://ftp.mnp.nl/hyde/hyde31_final/1910ad_pop.zip'ftp data connection made, file length 14694703 bytesopened URLdownloaded 14.0 Mb [1] 0 On Fri, Mar 18, 2011 at 12:17 PM, Henrique Dallazuanna <www...@gmail.com>wrote: > Try this: > > tryCatch(log(rnorm(10)), warning = function(m)deparse(m$call[[2]])) > > Where log(rnorm(10)) is your expr to evaluate. > > On Fri, Mar 18, 2011 at 4:04 PM, steven mosher <mosherste...@gmail.com> > wrote: > > I've read the help and the archives on tryCatch but I'm still stuggling > > trying to understand how it > > works exactly and how I can use it to get the result I need. > > > > I have a data.frame of urls which point to 11 .zip files. Basically I use > > RCurl to get the list of > > files from a ftp and then reduce that directory dump to the 11 zip files > I > > want to download. > > > > Its easy enough to do that in a loop over the elements in data.frame. > > > > The problem is that the site is very inconsistent. All 11 files will > > download, but I will get random > > warnings that the size of some of the files does not match what was > > downloaded. > > So at the end of the loop I may get 5 warnings about the file size not > > matching. > > These files, when tried a second or third time, will eventually download > > properly. > > > > What I want to do is record which files had this download warning. > > > > [[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. > > > > > > -- > Henrique Dallazuanna > Curitiba-Paraná-Brasil > 25° 25' 40" S 49° 16' 22" O > [[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.