Question about a class member
Robert
rxjwg98 at gmail.com
Thu Jan 7 12:23:56 EST 2016
Hi,
I am using a download package. When I read its code, see below please, I
don't know what 'sample' is:
----------
model = hmm.GaussianHMM(n_components=4, covariance_type="full")
model.startprob_ = startprob
model.transmat_ = transmat
model.means_ = means
model.covars_ = covars
# Generate samples
X, Z = model.sample(50)
-------------
When I read its (class) definition, I find the following part (which may not
be sure 100% the above origination yet, but it is the only line being
'sample').
//////////////
self.gmms_ = []
for x in range(self.n_components):
if covariance_type is None:
gmm = GMM(n_mix)
else:
gmm = GMM(n_mix, covariance_type=covariance_type)
self.gmms_.append(gmm)
def _init(self, X, lengths=None):
super(GMMHMM, self)._init(X, lengths=lengths)
for g in self.gmms_:
g.set_params(init_params=self.init_params, n_iter=0)
g.fit(X)
def _compute_log_likelihood(self, X):
return np.array([g.score(X) for g in self.gmms_]).T
def _generate_sample_from_state(self, state, random_state=None):
return self.gmms_[state].sample(1, random_state=random_state).flatten()
////////////
The above code looks like self.gmms is a list, which has an attribute
'sample'. But when I play with a list, there is no 'sample' attribute.
..........
a=[1, 32.0, 4]
a
Out[68]: [1, 32.0, 4]
type(a)
Out[69]: list
a[0].sample(1,5)
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-70-ce2e8159b438> in <module>()
----> 1 a[0].sample(1,5)
AttributeError: 'int' object has no attribute 'sample'
a[1].sample(1,5)
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-71-0364cee47aa3> in <module>()
----> 1 a[1].sample(1,5)
AttributeError: 'float' object has no attribute 'sample'
////////////
What is 'sample' do you think?
Thanks,
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