What is the heat map of two discrete variables in R language ggplot2?
This article shows you how the R language ggplot2 two discrete variables draw heat maps respectively, the content is concise and easy to understand, it can definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.
Partial screenshot of the data set, with a total of 81 rows and 52 columns. The row is the species, the column is the location, and the value represents the species abundance.
Dataset download link http://userweb.eng.gla.ac.uk/umer.ijaz/bioinformatics/ecological/SPE_pitlatrine.csv
Read in data abund_table
