R.utils: countLines – R documentation

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countLines

Counts the number of lines in a text file

Description

Counts the number of lines in a text file by counting the number of occurrences 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.

Details

Both compressed and non-compressed files are supported.

Value

Returns an non-negative integer.

Author(s)

Henrik Bengtsson

References

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

Examples

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

R.utils

Various Programming Utilities

v2.10.1

LGPL (>= 2.1)

Authors

Henrik Bengtsson [aut, cre, cph]

Initial release