Publications by Chuck Powell

ANCOVA example – April 18, 2019

I recently had the need to run an ANCOVA, not a task I perform all that often and my first time using R to do so (I’ve done it in SPSS and SAS before). Having a decent theoretical idea of what I had to do I set off in search of decent documentation on how to accomplish it in R. I was quite disappointed with what I found after a decent amount of...

15687 sym R (18040 sym/14 pcs) 10 img

Upgrading to R 3.6.0 on a Mac – May 14, 2019

Every time there is a new major update from The R Foundation (like the recent 3.6.0 release in April). I’m always happy to see the continuing progress and the combination of new features and bug fixes, but I also dread the upgrade because it means I have to address the issue of what to do about the burgeoning number of packages (libraries) I ha...

6424 sym R (8206 sym/9 pcs)