出典:Wikipedia
出典:『Wikipedia』 (2011/06/03 14:11 UTC 版)
A heat map is a graphical representation of data where the values taken by a variable in a two-dimensional table are represented as colors. Fractal maps and tree maps both often use a similar system of color-coding to represent the values taken by a variable in a hierarchy. The term is also used to mean its thematic application as a choropleth map.