How to use ggplot2 to realize a picture that can't be named?

How to use ggplot2 to achieve a picture can not be named, I believe that many inexperienced people do not know what to do, so this paper summarizes the causes of the problem and solutions, through this article I hope you can solve this problem.

I saw a picture in the paper as follows:

It may be used recently, so I thought about how to achieve it. I don't know the name of this kind of picture, so I can't search it. But it feels like there should be a ready-made package in R language to make this picture. This picture is a bit like the heat map made by ggplot2. Try to implement this picture with ggplot2. The geom_tile () function is usually used to make heat maps with ggplot2.

The first is an example of the geom_tile () function

Construct a dataset with reference to https://www.r-bloggers.com/how-to-make-a-simple-heatmap-in-ggplot2/

Df