In this recipe, we will make a heat map that shows the variation in values of one variable (
z) along the x and y axes as a grid of colors and display a scale alongside.
We will only use the base graphics functions for this recipe. So, just open up the R prompt and type in the following code. We will use the
sales.csv example dataset for this recipe. So, let's first load it:
We will use the
RColorBrewer package for some good color palettes. So, let's make sure that it's installed and loaded:
sales dataset has monthly sales data for four cities. Let's make a heat map with the months ...