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from __future__ import print_function, division, absolute_import, unicode_literals
import numpy as np
from cosmoHammer import getLogger
class MultivarianteGaussianModule(object):
"""
Chain for computing the likelihood of a multivariante gaussian distribution
"""
def __init__(self, icov, mu):
self.icov = icov
self.mu = mu
def computeLikelihood(self, ctx):
x = ctx.getParams()
diff = x-self.mu
return -np.dot(diff,np.dot(self.icov,diff))/2.0
def setup(self):
getLogger().info("Multivariante Gaussian setup")
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