Posts by Corey Sparks, Ph.D.
Author: Corey Sparks, Ph.D.
Feed: R-bloggers. Author: Corey Sparks, Ph.D.. Classification methods and modelsIn classification methods, we are typically interested in using some observed characteristics of a case to predict a binary categorical outcome. This can be extended to a multi-category outcome, but the largest number of applications involve a 1/0 outcome.Below, we look at a few classic methods of doing this:There are other methods that we will examine but these are probably the easiest to understand.In these examples, we will use the Demographic and Health Survey Model Data. These are based on the DHS survey, but are publicly available and are used to ... Read More
Feed: R-bloggers. Author: Corey Sparks, Ph.D.. [This article was first published on Corey Sparks R blog, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.In this topic, we will discuss Unsupervised Learning, or as we talked about last time, the situation where you are looking for groups in your data when your data don’t come with a group variable. I.e. sometimes you want to find groups of similar observations, and you need a statistical tool ... Read More