I am creating a new plot infrastructure and I cannot understand what this type of plot should be called.
This is a fairly basic plot where you have an XY Cartesian grid and each cell in the grid represents data for this X, Y coordinate. Sometimes these cells contain continuous values which will be represented with a color gradient scale . In this case, I would call it a heat map. However, sometimes it will contain boolean data, so i will only have one color for true and one for false. It doesn't really seem like a heat map to me. It is possible that someday I will add other types of discrete values (like enumerations) where I will just have a different color for each value.
Is there a term that covers both heat maps and other heat map graphics where you have discrete values?