install_version

package

If the specified version is NULL or the same as the most
recent version of the package, this function simply calls
<code><a rd-options="" href="/link/install?package=devtools&version=1.12.0" data-mini-rdoc="devtools::install">install</a></code>. Otherwise, it looks at the list of
archived source tarballs and tries to install an older version instead.

version


    character vector, the base URL(s) of the repositories
    to use, e.g., the URL of a CRAN mirror such as
    <code>"http://cran.us.r-project.org"</code>.  For more details on
    supported URL schemes see <code><a rd-options="" href="/link/url?package=devtools&version=1.12.0" data-mini-rdoc="devtools::url">url</a></code>.<p></p><p>    Can be <code>NULL</code> to install from local files, directories or URLs:
    this will be inferred by extension from <code>pkgs</code> if of length one.
  </p>

repos

character, indicating the type of package to download and
    install.  Will be <code>"source"</code> except on Windows and some OS X
    builds: see the section on &#145;Binary packages&#146; for those.
  

type

Other arguments passed on to <code><a rd-options="" href="/link/install?package=devtools&version=1.12.0" data-mini-rdoc="devtools::install">install</a></code>.


If you are installing an package that contains compiled code, you will
need to have an R development environment installed.  You can check
if you do by running <code><a rd-options="" href="/link/has_devel?package=devtools&version=1.12.0" data-mini-rdoc="devtools::has_devel">has_devel</a></code>.


Hadley Wickham

devtools

Tools to Make Developing R Packages Easier

install_version function

If the specified version is NULL or the same as the most
recent version of the package, this function simply calls
<code><a rd-options='' href='install'>install</a></code>. Otherwise, it looks at the list of
archived source tarballs and tries to install an older version instead.


    character vector, the base URL(s) of the repositories
    to use, e.g., the URL of a CRAN mirror such as
    <code>"http://cran.us.r-project.org"</code>.  For more details on
    supported URL schemes see <code><a rd-options='' href='url'>url</a></code>.

    Can be <code>NULL</code> to install from local files, directories or URLs:
    this will be inferred by extension from <code>pkgs</code> if of length one.
  

Other arguments passed on to <code><a rd-options='' href='install'>install</a></code>.


If you are installing an package that contains compiled code, you will
need to have an R development environment installed.  You can check
if you do by running <code><a rd-options='' href='has_devel'>has_devel</a></code>.


install_version: Install specified version of a CRAN package.

Description

Usage

Arguments

See Also