# Category Archives: Graphics

## Pearson’s r: Not a good measure of electoral persistence

Pearson’s product-moment correlation, $$r$$, is an incredibly useful tool for getting some idea about how two variables are (linearly) related. But there are times when using Pearson’s $$r$$ is not appropriate and, even if linearity and all other assumptions hold, … Continue reading

Posted in Data analysis, Graphics, Poland, Political parties, R | 2 Comments

## A simple frequency plot

I’m currently working on a paper that uses Polish survey data (EVS 2008). I am specifically looking at regional variation in particular responses. Because there are only around 1800 observations in the survey, which are split across 66 subregions of … Continue reading

Posted in Data analysis, Graphics, R | 1 Comment