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Octave Blog Posts

(2020-11-23) Update: Support for the JSON data format after GSoC 2020

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The Google Summer of Code (GSoC) 2020 is over and I had the pleasure to mentor Abdallah Elshamy, who enriched Octave with the jsondecode() and jsonencode() functions. A remaining issue was the translation of the Octave function matlab.lang.makeValidName to the C++ language. This is now accomplished and the overall results are great.

(2020-11-08) rsync boosted Buildbots

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Using rsync instead of Buildbot’s own file transfers, which are known to be slow, significantly reduced the file transfer time between the Buildbot Workers and the Buildbot Master from 25.5 hours to about 18 minutes (-98%). This improvement, and a few others, enables a single “strong” Worker to build and publish Octave and all MS Windows installers within 24 hours or with four parallel Workers within 6 hours.

(2020-10-16) Fresh brewed Octave - every day!

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The octave-buildbot Server and Worker matured a lot in the past two months since I wrote about them in August. Finally, the system is capable of delivering once per day a “fresh brewed” stable Octave release (tarballs, all flavors of MS Windows installers, and the Doxygen documentation). See it yourself on https://octave.space.

(2020-08-19) Support for the JSON data format after GSoC 2020

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The Google Summer of Code (GSoC) 2020 will end with this August. I had the pleasure to mentor Abdallah Elshamy working on the implementation of the jsondecode() and jsonencode() functions for Octave. These function allow to convert JSON data strings to Octave Objects and vice versa.

(2020-08-17) octave-buildbot: Less painful Octave releases?

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Since the minor Octave 5.2 release this January, I experienced that building and especially releasing Octave is still a difficult task. Even worse, due to some nasty bugs and the lack of a voluntary, skilled, and motivated release manager, the next major Octave 6.1 release got stuck for eight months now.

(2020-07-01) Boosting the Octave `hilb` function

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Today, I read an interesting article about Hilbert Matrices in N. Higham’s blog and stumbled over these simple elegant two lines:

(2020-06-18) Testing the OctaveCoder

On June 4th there arrived an extraordinary mail by Hossein on the Octave maintainers mailing-list. To my knowledge he has not been involved into Octave development so far. He introduced shortly and convincingly OctaveCoder:

(2020-06-17) Can git and Mercurial work together?

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Many popular source code hosting services do not support Mercurial (in short “hg”). After Bitbucket announced the “sunsetting” of Mercurial repositories in April 2020, only good old SourceForge and GNU Savannah still support hg.

(2019-12-24) Talk about Octave at the University of Tokyo

This Christmas I had the honor to give a seminar talk at the University of Tokyo, which was organized by JSIAM.

(2019-11-22) Talk: Scientific programming with GNU Octave

At the Shibaura Institute of Technology I was given the opportunity to talk about GNU Octave.

(2017-03-20) Talk at the OctConf 2017 at CERN

The slides of today’s talk at the OctConf2017 at CERN are available here.

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