1. 原版. 喜欢基础图形风格可以用stats自带的heatmap()
2. lattice.
levelplot()和latticeExtra中的dendrogramGrob(). 详情参考《lmdvr》:
6.2.3 Visualizing discrete array data pp. 105-109
9.2.7 Further control: The legend argument pp. 161-163
3. ggplot2.
http://learnr.wordpress.com/2010/01/26/ggplot2-quick-heatmap-plotting/