enthought/chaco — pull request #86 by endolith (2013-01-02 17:28:00+00:00)
Title: Change wording for spectrum example, use hot colormap for spectrogram

The `jet` colormap is for bipolar data (range of [−1, +1]), while spectrogram amplitude is unipolar (range of [0, +1]), so a sequential map like `hot` is a better choice.

http://www.jwave.vt.edu/~rkriz/Projects/create_color_table/color_07.pdf