Heatmaps

Introduction to heatmaps

Heatmaps are graphical representations of data where the values are represented as colors. They are a valuable tool for visualizing and understanding large datasets, as they can help identify patterns and trends in the data. In ggplot2, heatmaps can be created using the geom_tile() function.

Let’s first create a numerical matrix in R using the rnorm function, as shown in the code below: