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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><title>R: Find Reverse Dependencies</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 dependsOnPkgs"><tr><td>dependsOnPkgs</td><td align="right">R Documentation</td></tr></table>
<h2>Find Reverse Dependencies</h2>
<h3>Description</h3>
<p>Find ‘reverse’ dependencies of packages, that is those packages
which depend on this one, and (optionally) so on recursively.
</p>
<h3>Usage</h3>
<pre>
dependsOnPkgs(pkgs,
dependencies = c("Depends", "Imports", "LinkingTo"),
recursive = TRUE, lib.loc = NULL,
installed = installed.packages(lib.loc, fields = "Enhances"))
</pre>
<h3>Arguments</h3>
<table summary="R argblock">
<tr valign="top"><td><code>pkgs</code></td>
<td>
<p>a character vector of package names.</p>
</td></tr>
<tr valign="top"><td><code>dependencies</code></td>
<td>
<p>a character vector listing the types of
dependencies, a subset of <code>c("Depends", "Imports", "LinkingTo",
"Suggests", "Enhances")</code>. Character string <code>"all"</code> is
shorthand for that vector.</p>
</td></tr>
<tr valign="top"><td><code>recursive</code></td>
<td>
<p>logical: should reverse dependencies of reverse
dependencies (and so on) be included?</p>
</td></tr>
<tr valign="top"><td><code>lib.loc</code></td>
<td>
<p>a character vector of <font face="Courier New,Courier" color="#666666"><b>R</b></font> library trees, or <code>NULL</code>
for all known trees (see <code>.libPaths</code>).</p>
</td></tr>
<tr valign="top"><td><code>installed</code></td>
<td>
<p>a result of calling <code>installed.packages</code>.</p>
</td></tr>
</table>
<h3>Value</h3>
<p>A character vector of package names, which does not include any from
<code>pkgs</code>.
</p>
<h3>Examples</h3>
<pre>
## there are few dependencies in a vanilla R installation
dependsOnPkgs("lattice")
</pre>
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