countLines

0th

Percentile

Counts the number of lines in a text file

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.

Keywords
programming
Usage
# S3 method for default
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.

References

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

Aliases
  • countLines.default
  • countLines
Examples
# NOT RUN {
pathname <- system.file("NEWS", package="R.utils");
n <- countLines(pathname);
n2 <- length(readLines(pathname));
stopifnot(n == n2);
# }
Documentation reproduced from package R.utils, version 2.8.0, License: LGPL (>= 2.1)

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