On a Windows platform I am trying to count the number of lines in a file. In a DOS window, the following works: C:\Users\jar>findstr /R /N "^" D:\my_dir\my_file | find /C ":" 5317 (it works with double \\ also)
But in R, I need to make this string up with the file name I get from file.choose(): filename = file.choose() #get the number of lines in the file # first make a command string with the filename in it cmd = paste('findstr /R /N "^" ', filename, ' | find /C ":"', sep=""') nrec = as.numeric(shell(cmd)) But R puts in escape characters for the ": > cmd [1] "findstr /R /N \"^\" D:\\my_dir\\my_file | find /C \":\"" and shell(cmd) does not work properly. And > nrec=shell('findstr /R /N "^"D:\\my_dir\\my_file | find /C ":"') > nrec [1] 0 does not work either. What am I doing wrong? Thanks, Jim ______________________________________________ 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.