1.2.7 Colour Maps, Contour Maps and Surface Plots

The following plot styles differ from those above in that, regardless of whether a three-dimensional plot is being produced, they read in datapoints with $x$, $y$ and $z$ coordinates in three columns. The first two are useful for producing two-dimensional representations of $(x,y,z)$ surfaces using colours or contours to show the magnitude of $z$, while the third is useful for producing three-dimensional graphs of such surfaces:

They are discussed in detail in Sections 1.12, 1.13 and 1.14.1 respectively.