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(This article was first published on <strong><a href="http://dirk.eddelbuettel.com/blog/2016/05/28#rcpparmadillo_0.7.100.3.0"> Thinking inside the box </a></strong>, and kindly contributed to <a rel="nofollow" href="http://www.r-bloggers.com/">R-bloggers)</a> </div>
<p><img alt="armadillo image" src="http://i0.wp.com/arma.sourceforge.net/img/armadillo_logo.png?w=248" data-recalc-dims="1"></p>
<p>The first <a target="_blank" href="http://arma.sourceforge.net/">Armadillo</a> release of the 7.* series is out: a new version 7.100.3. We uploaded <a target="_blank" href="http://dirk.eddelbuettel.com/code/rcpp.armadillo.html">RcppArmadillo</a> 0.7.100.3.0 to <a target="_blank" href="http://cran.r-project.org/">CRAN</a> and <a target="_blank" href="http://www.debian.org/">Debian</a>. This followed the usual thorough reverse-dependecy checking of by now 230 packages using it.</p>
<p>This release now <em>requires</em> a recent enough compiler. As <code>g++</code> is so common, we explicitly test for version 4.6 or newer. So if you happen to be on an older RHEL or CentOS release, you may need to get yourself a more modern compiler. R on Windows is now at 4.9.3 which is decent (yet stable) choice; the 4.8 series of <code>g++</code> will also do. For reference, the current LTS of Ubuntu is at 5.3.1, and we have <code>g++</code> 6.1 available in Debian testing.</p>
<p>This new upstream release adds a few new helper functions (which are particularly useful in statistics, but were of course already available to us via Rcpp), more slicing of <code>Cube</code> data structures and a brand new sparse matrix decomposition module courtesy of <a target="_blank" href="http://statr.me/">Yixuan Qiu</a> — whom R users know as the author of the <a target="_blank" href="https://cran.r-project.org/web/packages/RSpectra/index.html">RSpectra</a> package (which replaces his older <a target="_blank" href="https://cran.r-project.org/web/packages/rARPACK/index.html">rArpack</a> package) and of course all the most excellent work he provided to <a target="_blank" href="https://cran.r-project.org/web/packages/RcppEigen/index.html">RcppEigen</a>.</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>Changes in this release are as follows:</p>
<blockquote>
<h4>
Changes in RcppArmadillo version 0.7.100.3.0 (2016-05-25)<br>
</h4>
<ul>
<li>
<p>
Upgraded to Armadillo test release 7.100.3
</p>
<ul>
<li>
<p>
added <code>erf()</code>, <code>erfc()</code>, <code>lgamma()</code>
</p>
</li>
<li>
<p>
added <code>.head_slices()</code> and <code>.tail_slices()</code> to subcube views
</p>
</li>
<li>
<p>
<code>spsolve()</code> now requires SuperLU 5.2
</p>
</li>
<li>
<p>
<code>eigs_sym()</code>, <code>eigs_gen()</code> and <code>svds()</code> now use a built-in reimplementation of ARPACK for real (non-complex) matrices (code contributed by Yixuan Qiu)
</p>
</li>
</ul>
</li>
<li>
<p>
The <code>configure</code> code now checks against old <code>g++</code> version which are no longer sufficient to build the package.
</p>
</li>
</ul>
</blockquote>
<p>Courtesy of <a target="_blank" href="http://dirk.eddelbuettel.com/cranberries/">CRANberries</a>, there is also a <a target="_blank" href="http://dirk.eddelbuettel.com/cranberries/2016/05/27#RcppArmadillo_0.7.100.3.0">diffstat report for this release</a>. As always, 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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