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Circular statistics deals with analysis of measurements made using a circular scale, e.g., minutes past the hour, days of the week. Wikipedia uses the term directional statistics, the traditional use being measurements of angles, e.g., wind direction. Package support for circular statistics is rather thin on the ground. ... [Read more...]

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Why don’t compiler projects for the R language make it into production use? The few that have been written have remained individual experimental products, e.g., RLLVMCompile. Most popular languages attract many compiler implementations. I’m not saying that any of these implementations have more than a handful of ... [Read more...]

Why don’t compiler projects for the R language make it into production use? The few that have been written have remained individual experimental products, e.g., RLLVMCompile. Most popular languages attract many compiler implementations. I’m not saying that any of these implementations have more than a handful of ... [Read more...]

My book, Evidence-based software engineering, is now available; the pdf can be downloaded here, here and here, plus all the code+data. Report any issues here. I’m investigating the possibility of a printed version. Mobile friendly pdf (layout shaky in places). The original goals of the book, from 10-years ... [Read more...]

My book, Evidence-based software engineering, is now available; the pdf can be downloaded here, here and here, plus all the code+data. Report any issues here. I’m investigating the possibility of a printed version. The original goals of the book, from 10-years ago, have been met, i.e., discuss ... [Read more...]

My book, Evidence-based software engineering: based on the publicly available data is now out on beta release (pdf, and code+data). The plan is for a three-month review, with the final version available in the shops in time for Christmas (I plan to get a few hundred printed, and made ... [Read more...]

My book, Evidence-based software engineering: based on the publicly available data is now out on beta release (pdf, and code+data). The plan is for a three-month review, with the final version available in the shops in time for Christmas (I plan to get a few hundred printed, and made ... [Read more...]

When I started my evidence-based software engineering book, nobody had written a data analysis book for software developers, so I had to write one (in fact, a book on this topic has still to be written). When I say “I had to write one”, what I mean is that the 200 ... [Read more...]

When I started my evidence-based software engineering book, nobody had written a data analysis book for software developers, so I had to write one (in fact, a book on this topic has still to be written). When I say “I had to write one”, what I mean is that the 200 ... [Read more...]

At the end of March a paper modelling the impact of various scenarios on the spread of COVID-19 infections, by the MRC Centre for Global Infectious Disease Analysis at Imperial College, appears to have influenced the policy of the powers that be. This group recently started publishing their modelling code ... [Read more...]

At the end of March a paper modelling the impact of various scenarios on the spread of COVID-19 infections, by the MRC Centre for Global Infectious Disease Analysis at Imperial College, appears to have influenced the policy of the powers that be. This group recently started publishing their modelling code ... [Read more...]

The Source code chapter of my evidence-based software engineering book has been reworked (draft pdf). When writing the first version of this chapter, I was not certain whether source code was a topic warranting a chapter to itself, in an evidence-based software engineering book. Now I am certain. Source code ... [Read more...]

The Source code chapter of my evidence-based software engineering book has been reworked (draft pdf). When writing the first version of this chapter, I was not certain whether source code was a topic warranting a chapter to itself, in an evidence-based software engineering book. Now I am certain. Source code ... [Read more...]

The Reliability chapter of my evidence-based software engineering book has been updated (draft pdf). Unlike the earlier chapters, there were no major changes to the initial version from over 18-months ago; we just don’t know much about software reliability, and there is not much public data. There are lots ... [Read more...]

The Reliability chapter of my evidence-based software engineering book has been updated (draft pdf). Unlike the earlier chapters, there were no major changes to the initial version from over 18-months ago; we just don’t know much about software reliability, and there is not much public data. There are lots ... [Read more...]

Estimating how long it will take to complete a task is hard work, and the most common motivation for this work comes from external factors, e.g., the boss, or a potential client asks for an estimate to do a job. People also make estimates for their own use, e.... [Read more...]