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import numpy as np
class MyTreat(object):
def __init__(self, reference=0):
self.reference = reference
def code_with_intercept(self, levels):
return ContrastMatrix(np.eye(len(levels)),
["[My.%s]" % (level,) for level in levels])
def code_without_intercept(self, levels):
eye = np.eye(len(levels) - 1)
contrasts = np.vstack((eye[:self.reference, :],
np.zeros((1, len(levels) - 1)),
eye[self.reference:, :]))
suffixes = ["[MyT.%s]" % (level,) for level in
levels[:self.reference] + levels[self.reference + 1:]]
return ContrastMatrix(contrasts, suffixes)
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