Chapter 7 Titles

Adding row, column and plot titles to your heatmap is easy.

7.1 Plot title

Plot titles are very important for presenting your visualizations. You can set the plot title by title.

superheat(mtcars,
          # scale the matrix columns
          scale = TRUE,
          # plot title
          title = "Superheat for mtcars",
          title.size = 8)

Note that the default plot title is left-aligned. This can be changed using the title.alignment argument whose options are left, center, and right.

superheat(mtcars,
          # scale the matrix columns
          scale = TRUE,
          # plot title
          title = "Superheat for mtcars",
          title.alignment = "center")

7.2 Row and column titles

Adding titles to the columns and rows is easy too. Simply supply the desired row and column titles for the row.title and column.title arguments

superheat(mtcars,
          # scale the matrix columns
          scale = TRUE,
          # row title
          row.title = "Cars",
          row.title.size = 6,
          # col title
          column.title = "Variables",
          column.title.size = 6)