Posts

Dummy variables are important but also cause much frustration in intro-stat courses. Below I will demonstrate the concept via a linear …
Last updated on 3 min read R

It is with great pleasure that we can announce the release of caracas version 1.0.1 to CRAN …
Last updated on 3 min read R, R-bloggers

It is often very useful to practise mathematics by automatically generated exercises. One approach is multiple choice quizzes (MCQ), …
Last updated on 3 min read R, R-bloggers

It is with great pleasure that I can announce that Ryacas version 1.1.0 has now been accepted into Journal of Open Source Software and …
Last updated on 2 min read R

Back in 2017, David Balding and I published the paper “How convincing is a matching Y-chromosome profile?”. One of the key parameters …
Last updated on 5 min read Forensic genetics

In inexact line search (a numerical optimisation technique) the step length (or learning rate) must be decided. In connection to that …
Last updated on 6 min read Statistics

It is with great pleasure that I can announce that Ryacas version 1.0.0 is now released to CRAN …
Last updated on 4 min read R, R-bloggers

Update Oct 14, 2019: Michael Höhle caught a mistake and notified me on Twitter. Thanks! The problem is that I used \(\text{Unif}(-10, …
Last updated on 4 min read Statistics, R-bloggers

In a recent blog post I tried to get yacas to solve a system of polynomial equations. Unfortunately it could not do that, so I solved …
Last updated on 3 min read R, R-bloggers

Update on Aug 9, 2022: In the code chunk below, sd = summary(fit_gam)$scale) was changed to sd = sqrt(summary(fit_gam)$scale)): y_sim …
Last updated on 4 min read R, R-bloggers