Martin J Frigaard

Collecting twitter data with R This is a quick how-to on collecting twitter data with the rtweet package. I found the vignettes and website for this package incredibly helpful. This tutorial was prompted by a request from a colleague: use any program or method of your choosing, retrieve just a small sample of tweets with latitude and longitude info and use at least one or more of the keywords. The “keywords” came in an excel file. I read this file into RStudio and examined the data struc...

Motivation In my graduate program we had an excellent text on Regression Methods in Biostatistics (which I will refer to as VGSM). Unfortunately, all of the examples and code from the courses, labs, and text were in Stata. As an R user, I kept having to translate the topics from Stata into R. But this actually turned into a valuable exercise because it forced me to separate the underlying statistical concepts from the programming languages. I've decided to post various parts of the text/topics...