Chisala has his 3rd installment up: http://www.unz.com/article/closing-the-black-white-iq-gap-debate-part-3/ One idea I had while reading it was that tail effects interact with population ethnic/racial heterogeneity. To show this, I did a simulation…
Do you find yourself in need of making nice ggplot2 plots for group means over and over again? Are you tired of (re-)writing big chunks of code for something that…
Often I want to get the mean value for a case across a number of columns, usually years. This however gets repetitive because the base mean() function cannot handle data…
One idea for a series of blog posts is that I could about new functions in my R package. Often I just push these without letting anyone know, but I…
It is often said that polygenic traits are based on tons of causal variants each of which has a very small effect size. What is less often discussed is the…
Just a quick analysis. When I read the Dutch crime report that forms the basis of this paper, I noticed one table that had crime rates by the proportion of…
Scraping with R Although other languages are probably more suitable for web scraping (e.g. Python with Scrapy), R does have some scraping capabilities. Unsurprisingly, the ever awesome Hadley has written…
https://twitter.com/KirkegaardEmil/status/641272758257717248 https://twitter.com/pnin1957/status/641284556818096128 Let's test that. Since we don't have the original data, we can't use that. We can however use open datasets. I like to use Wicherts' dataset. So let's…
I looked around to see if I could find a nice function for just plotting the results of kmeans() using ggplot2. I could not find that. So I wrote my…
Edit 2019 You don't really need the below. Look at the `model.matrix()` function, which converts data frames into matrices for glmnet and similar function. Original post Sometimes you need to…