Analyzing a simple experiment with heterogeneous variances using asreml, MCMCglmm and SAS

I was working with a small experiment which includes families from two Eucalyptus species and thought it would be nice to code a first analysis using alternative approaches. The experiment is a randomized complete block design, with species as fixed effect and family and block as a random effects, while the response variable is growth… Continue reading Analyzing a simple experiment with heterogeneous variances using asreml, MCMCglmm and SAS

When R, or any other language, is not enough

This post is tangential to R, although R has a fair share of the issues I mention here, which include research reproducibility, open source, paying for software, multiple languages, salt and pepper. There is an increasing interest in the reproducibility of research. In many topics we face multiple, often conflicting claims and as researchers we… Continue reading When R, or any other language, is not enough

Coming out of the (Bayesian) closet: multivariate version

This week I'm facing my—and many other lecturers'—least favorite part of teaching: grading exams. In a supreme act of procrastination I will continue the previous post, and the antepenultimate one, showing the code for a bivariate analysis of a randomized complete block design. Just to recap, the results from the REML multivariate analysis (that used… Continue reading Coming out of the (Bayesian) closet: multivariate version