We have studied two-dimensional heat maps, but R also allows us to plot three-dimensional interactive heat maps using the
NeatMap package. The
NeatMap package manual states the limitation of using the
heatmap() function as "The traditional clustered heatmap makes use of cluster analysis to re-order rows and columns such that similar elements are placed together. However, cluster analysis is a poor choice for ordering method since this does not provide a unique ordering".
In order to plot a three-dimensional heat map and a stereo map, we would need to install the
NeatMap package available ...