How can I check if a file is empty?

Question

I have thousands of text files and would like to know how to check if a particular file is empty. I am reading all the files using this line of code

Y<-grep(\         


        

Answer 1

You can use file.info for that:

info = file.info(filenames)
empty = rownames(info[info$size == 0, ])

Incidentally, there’s a better way of listing text files than using grep: specify the pattern argument to list.files:

list.files(pattern = '\\.txt$')

Notice that the pattern needs to be a regular expression, not a glob – the same is true for grep!