charlton/charlton — pull request #4 by jseabold (2012-04-04 00:52:41+00:00)
Title: Add more contrasts. Sum, Helmert, Simple, BDiff

Went ahead and added some more contrasts, if you don't have them. Now able to work through this [1] with charlton+statsmodels [2]. You can also get an idea of what the input/output looks like if you install that branch and build the docs.

[1] www.ats.ucla.edu/stat/r/library/contrast_coding.htm
[2] https://github.com/jseabold/statsmodels/commit/918cd669a91140c51f9669a3d87835eac4948911