A demonstration of how to bulid a heatmap with mouseover, and mouseleave behaviour in 3 distinct functions. The square style is slightly modified when the element is hovered. It allows to make more obvious which element is observed. In this exmple I used only subset of the dataset as follow:

Japan Mexico Brazil Argentina Philippines Russia Turkey France

Then, I represent male and female suicide rates.

DATASET

Suicide Rates Overview 1985 to 2016

This work inspierd from here