Informal notes about common linear algebra / matrix operations in R

The tmerge() function in the survival package is used to structure data to represent time-dependent variables in a survival analysis. This post shows a minimal example of how to use tmerge.

A short simulation example showing why dichomization of continuous variables can lead to wrong conclusions.

A short guide to creating a bookdown book using the bs4 theme

Exploring gradient descent using R and a minimal amount of mathematics

Functions from the tidyverse provide a powerful way to do statistical simulations. We demonstrate this approach by evaluating the properties of the mean and median as estimators of center for two distributions.”

tidyverse

Type I error is increased when you test your hypothesis multiple times during the data collection process. Simulations can provide a clear picture of this process.

Exploring the idea of a statistic by simulating dice rolls in R