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(This article was first published on <strong><a href="http://dirk.eddelbuettel.com/blog/2016/08/25#rcpparmadillo_0.7.400.2.0"> Thinking inside the box </a></strong>, and kindly contributed to <a rel="nofollow" href="https://www.r-bloggers.com/">R-bloggers)</a> </div>
<p><img alt="armadillo image" src="https://i0.wp.com/arma.sourceforge.net/img/armadillo_logo.png?w=248" data-recalc-dims="1"></p>
<p>Another <a target="_blank" href="http://arma.sourceforge.net/">Armadillo</a> 7.* release — now at 7.400. We skipped the 7.300.* serie release as it came too soon after our <a target="_blank" href="http://dirk.eddelbuettel.com/blog/2016/07/24#rcpparmadillo_0.7.200.2.0">most recent CRAN release</a>. Releasing <a target="_blank" href="http://dirk.eddelbuettel.com/code/rcpp.armadillo.html">RcppArmadillo</a> 0.7.400.2.0 now keeps us at the (roughly monthly) cadence which works as a good compromise between getting updates out at <a target="_blank" href="http://conradsanderson.id.au/">Conrad</a>‘s sometimes frantic pace, while keeping <a target="_blank" href="http://cran.r-project.org/">CRAN</a> (and <a target="_blank" href="http://www.debian.org/">Debian</a>) uploads to about once per month.</p>
<p>So we may continue the pattern of helping <a target="_blank" href="http://conradsanderson.id.au/">Conrad</a> with thorough regression tests by building against all (by now 253 (!!)) <a target="_blank" href="http://cran.r-project.org/">CRAN</a> dependencies, but keeping release at the <a target="_blank" href="https://github.com/RcppCore/RcppArmadillo">GitHub repo</a> and only uploading to <a target="_blank" href="http://cran.r-project.org/">CRAN</a> at most once a month.</p>
<p><a target="_blank" href="http://arma.sourceforge.net/">Armadillo</a> is a powerful and expressive C++ template library for linear algebra aiming towards a good balance between speed and ease of use with a syntax deliberately close to a Matlab.</p>
<p>The new upstream release adds new more helper functions. Detailed changes in this release relative to the previous <a target="_blank" href="http://cran.r-project.org/">CRAN</a> release are as follows:</p>
<blockquote>
<h4>
Changes in RcppArmadillo version 0.7.400.2.0 (2016-08-24)<br>
</h4>
<ul>
<li>
<p>
Upgraded to Armadillo release 7.400.2 (Feral Winter Deluxe)
</p>
<ul>
<li>
<p>
added <code>expmat_sym()</code>, <code>logmat_sympd()</code>, <code>sqrtmat_sympd()</code>
</p>
</li>
<li>
<p>
added <code>.replace()</code>
</p>
</li>
</ul>
</li>
</ul>
<h4>
Changes in RcppArmadillo version 0.7.300.1.0 (2016-07-30)<br>
</h4>
<ul>
<li>
<p>
Upgraded to Armadillo release 7.300.1
</p>
<ul>
<li>
<p>
added <code>index_min()</code> and <code>index_max()</code> standalone functions
</p>
</li>
<li>
<p>
expanded <code>.subvec()</code> to accept <code>size()</code> arguments
</p>
</li>
<li>
<p>
more robust handling of non-square matrices by <code>lu()</code>
</p>
</li>
</ul>
</li>
</ul>
</blockquote>
<p>Courtesy of <a target="_blank" href="http://dirk.eddelbuettel.com/cranberries/">CRANberries</a>, there is a <a target="_blank" href="http://dirk.eddelbuettel.com/cranberries/2016/08/25#RcppArmadillo_0.7.400.2.0">diffstat report</a>. More detailed information is on the <a target="_blank" href="http://dirk.eddelbuettel.com/code/rcpp.armadillo.html">RcppArmadillo page</a>. Questions, comments etc should go to the <a target="_blank" href="https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel">rcpp-devel mailing list</a> off the <a target="_blank" href="http://r-forge.r-project.org/projects/rcpp/">R-Forge</a> page.</p>
<p>
This post by <a target="_blank" href="http://dirk.eddelbuettel.com/">Dirk Eddelbuettel</a> originated on his <a target="_blank" href="http://dirk.eddelbuettel.com/blog/">Thinking inside the box</a> blog. Please report excessive re-aggregation in third-party for-profit settings.</p>
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