Heat maps in r how to is an easy to understand book that starts with a simple heat map and takes you all the way through to advanced heat maps with graphics and data manipulationheat maps in r. Instant heat maps in r how to provides you with practical recipes to create heat maps of all difficulty levels by yourself right from the start at the end of each recipe you will find an in depth analysis that will equip you with everything you need to know to frame the code to your own needs. Heat maps in r how to is an easy to understand book that starts with a simple heat map and takes you all the way through to advanced heat maps with graphics and data manipulationheat maps in r how to is the book for you if you want to make use of this free and open source software to get the most out of your data analysis. Print levelplot air data colregionsheatcolors xlab year ylab month main air passengers 1 the levelplot function creates a simple heat map with a color key to the right hand side of the map we can use the argument colregions heatcolors to change the default color transition to yellow and red