countLines {R.utils}R Documentation

Counts the number of lines in a text file

Description

Counts the number of lines in a text file by count the number of occurances of platform-independent newlines (CR, LF, and CR+LF [1]), including a last line with neither. An empty file has zero lines.

Usage

## Default S3 method:
countLines(file, chunkSize=5e+07, ...)

Arguments

file A connection or a pathname.
chunkSize The number of bytes read in each chunk.
... Not used.

Value

Returns an non-negative integer.

Author(s)

Henrik Bengtsson (http://www.braju.com/R/)

References

[1] Page Newline, Wikipedia, July 2008. http://en.wikipedia.org/wiki/Newline

Examples

pathname <- system.file("NEWS", package="R.utils");
n <- countLines(pathname);
n2 <- length(readLines(pathname));
stopifnot(n == n2);

[Package R.utils version 1.1.1 Index]