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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: Trim</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 trim {raster}"><tr><td>trim {raster}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Trim</h2> <h3>Description</h3> <p>Trim (shrink) a Raster* object by removing outer rows and columns that all have the same value (e.g. NA). </p> <p>Or remove the whitespace before or after a string of characters (or a matrix, or the character values in a data.frame). </p> <h3>Usage</h3> <pre> ## S4 method for signature 'Raster' trim(x, padding=0, values=NA, filename='', ...) ## S4 method for signature 'character' trim(x, internal=FALSE, ...) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>x</code></td> <td> <p>Raster* object or a character string</p> </td></tr> <tr valign="top"><td><code>values</code></td> <td> <p>numeric. Value(s) based on which a Raster* should be trimmed</p> </td></tr> <tr valign="top"><td><code>padding</code></td> <td> <p>integer. Number of outer rows/columns to keep</p> </td></tr> <tr valign="top"><td><code>filename</code></td> <td> <p>character. Optional output filename</p> </td></tr> <tr valign="top"><td><code>internal</code></td> <td> <p>logical. If <code>TRUE</code>, sequential internal spaces are replaced by a single space</p> </td></tr> <tr valign="top"><td><code>...</code></td> <td> <p>If <code>x</code> is a Raster* object: additional arguments as for <code><a href="writeRaster.html">writeRaster</a></code></p> </td></tr> </table> <h3>Value</h3> <p>A RasterLayer or RasterBrick object (if <code>x</code> is a Raster* object) or a character string (if <code>x</code> is a character string). </p> <h3>Author(s)</h3> <p>Robert J. Hijmans and Jacob van Etten</p> <h3>Examples</h3> <pre> r <- raster(ncol=18,nrow=18) r[39:49] <- 1 r[113:155] <- 2 r[200] <- 6 s <- trim(r) trim(" hi folks ! ") </pre> <hr /><div style="text-align: center;">[Package <em>raster</em> version 3.3-13 <a href="00Index.html">Index</a>]</div> </body></html>