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fixing qualtile code for some likelhoods

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James Hensman 2015-08-13 12:07:01 +01:00
parent 2af47f1d31
commit 9780fb48de
2 changed files with 14 additions and 3 deletions
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11
GPy/likelihoods/bernoulli.py
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@ -232,6 +232,17 @@ class Bernoulli(Likelihood):
np.seterr(**state) np.seterr(**state)
return d3logpdf_dlink3 return d3logpdf_dlink3
def predictive_quantiles(self, mu, var, quantiles, Y_metadata=None):
"""
Get the "quantiles" of the binary labels (Bernoulli draws). all the
quantiles must be either 0 or 1, since those are the only values the
draw can take!
"""
p = self.predictive_mean(mu, var)
return [np.asarray(p>(q/100.), dtype=np.int32) for q in quantiles]
def samples(self, gp, Y_metadata=None): def samples(self, gp, Y_metadata=None):
""" """
Returns a set of samples of observations based on a given value of the latent variable. Returns a set of samples of observations based on a given value of the latent variable.

6
GPy/likelihoods/poisson.py
View file

@ -137,7 +137,7 @@ class Poisson(Likelihood):
""" """
return self.gp_link.transf(gp) return self.gp_link.transf(gp)
def samples(self, gp, Y_metadata=None): def samples(self, gp, Y_metadata=None, samples=1):
""" """
Returns a set of samples of observations based on a given value of the latent variable. Returns a set of samples of observations based on a given value of the latent variable.
@ -145,5 +145,5 @@ class Poisson(Likelihood):
""" """
orig_shape = gp.shape orig_shape = gp.shape
gp = gp.flatten() gp = gp.flatten()
Ysim = np.random.poisson(self.gp_link.transf(gp)) Ysim = np.random.poisson(self.gp_link.transf(gp), [samples, gp.size]).T
return Ysim.reshape(orig_shape) return Ysim.reshape(orig_shape+(samples,))