file.nrow: Find the number of rows (lines) in a file.
In reader: Suite of Functions to Flexibly Read Data from Files

Description Usage Arguments Value Author(s) See Also Examples

Returns the number of lines in a file, which in the case of a datafile will often correspond to the number of rows, or rows+1. Can also do this for all files in the directory. File equivalent of nrow()

1	file.nrow(fn = "", dir = "", all.in.dir = FALSE)

`fn`	name of the file(s) to get the length of
`dir`	optional path for fn location, or specify all files in dir
`all.in.dir`	select whether to extract length for all files in dir

returns length of file (or all files)

Nicholas Cooper nick.cooper@cimr.cam.ac.uk

file.ncol

orig.dir <- getwd(); setwd(tempdir()); # move to temporary dir
write.table(matrix(rnorm(100),nrow=10),"temp.txt",col.names=FALSE)
file.nrow("temp.txt")
# use with caution, will be slow if dir contains large files
# not run # file.nrow(all.in.dir=TRUE) 
unlink("temp.txt")
setwd(orig.dir) # reset working directory to original