Datetime:2016-08-23 01:52:26         Topic: Debian          Share        Original >>
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(This article was first published on Thinking inside the box , and kindly contributed toR-bloggers)

The second Armadillo release of the 7.* series came out a few weeks ago: version 7.200.2. And RcppArmadillo version is now on CRAN and uploaded to Debian . This followed the usual thorough reverse-dependecy checking of by now over 240 packages using it.

For once, I let it simmer a little preparing only a package update via the GitHub repo without preparing a CRAN upload to lower the update frequency a little. Seeing that Conrad has started to release 7.300.0 tarballs, the time for a (final) 7.200.2 upload was now right.

Just like the previous, it now requires a recent enough compiler. As g++ 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 g++ will also do. For reference, the current LTS of Ubuntu is at 5.4.0, and we have g++ 6.1 available in Debian testing.

This new upstream release adds new indexing helpers, additional return codes on some matrix transformations, increased speed for compound expressions via vectorise , corrects some LAPACK feature detections (affecting principally complex number use under OS X), and a rewritten sample() function thanks to James Balamuta.

Armadillo 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.

Changes in this release (and the preceding GitHub-only release are as follows:

Changes in RcppArmadillo version (2016-07-22)

  • Upgraded to Armadillo release 7.200.2

  • The sampling extension was rewritten to use Armadillo vector types instead of Rcpp types (PR #101 by James Balamuta)

Changes in RcppArmadillo version (2016-06-06)

  • Upgraded to Armadillo release 7.200.1

    • added .index_min() and .index_max()

    • expanded ind2sub() to handle vectors of indices

    • expanded sub2ind() to handle matrix of subscripts

    • expanded expmat() , logmat() and sqrtmat() to optionally return a bool indicating success

    • faster handling of compound expressions by vectorise()

  • The configure code now (once again) sets the values for the LAPACK feature #define correctly.

Courtesy of CRANberries , there is a diffstat report . More detailed information is on the RcppArmadillo page . Questions, comments etc should go to the rcpp-devel mailing list off the R-Forge page.

This post by Dirk Eddelbuettel originated on his Thinking inside the box blog. Please report excessive re-aggregation in third-party for-profit settings.

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