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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Filename extensions</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="R.css" /> </head><body> <table width="100%" summary="page for extension {raster}"><tr><td>extension {raster}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Filename extensions</h2> <h3>Description</h3> <p>Get or change a filename extension </p> <h3>Usage</h3> <pre> extension(filename, value=NULL, maxchar=10) extension(filename) <- value </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>filename</code></td> <td> <p>A filename, with or without the path</p> </td></tr> <tr valign="top"><td><code>value</code></td> <td> <p>A file extension with or without a dot, e.g., ".txt" or "txt"</p> </td></tr> <tr valign="top"><td><code>maxchar</code></td> <td> <p>Maximum number of characters after the last dot in the filename, for that string to be considered a filename extension </p> </td></tr> </table> <h3>Value</h3> <p>A file extension, filename or path. </p> <p>If <code>ext(filename)</code> is used without a <code>value</code> argument, it returns the file extension; otherwise it returns the filename (with new extensions set to <code>value</code> </p> <h3>Examples</h3> <pre> fn <- "c:/temp folder/filename.exten sion" extension(fn) extension(fn) <- ".txt" extension(fn) fn <- extension(fn, '.document') extension(fn) extension(fn, maxchar=4) </pre> <hr /><div style="text-align: center;">[Package <em>raster</em> version 3.3-13 <a href="00Index.html">Index</a>]</div> </body></html>