Understanding the correlations in pairplots I was using pairplots and I'm stuck in understanding the pair wise relation between those features that have vertical or horizontal lines in the pair plots.
(Image source - source)

The correlation between say experience and age is pretty clear. I'm trying to interpret feature 'sex' with other features like 'age', 'education' etc. which shows horizontal/vertical lines at two distinct values. Also, help me understand the plot between 'wage' and 'experience', 'education' and 'age' etc.

The vertical and horizontal lines are there because one of those variables are categorial. For eg, in the bottom left image; sex vs wage, sex can only be 0 or 1, while wage does not have an upper bound.
