A binary feature encoding which adds one new joint-feature to the
joint-features defined by BinaryMaxentFeatureEncoding: a correction feature, whose
value is chosen to ensure that the sparse vector always sums to a
constant non-negative number. This new feature is used to ensure two
preconditions for the GIS training algorithm:
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__init__(self,
labels,
mapping,
unseen_features=False,
alwayson_features=False,
C=None)
x.__init__(...) initializes x; see x.__class__.__doc__ for signature |
source code
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list of (int, number)
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encode(self,
featureset,
label)
Given a (featureset, label) pair, return the corresponding vector of
joint-feature values. |
source code
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int
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length(self)
Returns:
The size of the fixed-length joint-feature vectors that are generated
by this encoding. |
source code
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str
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describe(self,
f_id)
Returns:
A string describing the value of the joint-feature whose index in the
generated feature vectors is fid . |
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Inherited from BinaryMaxentFeatureEncoding :
labels
Inherited from object :
__delattr__ ,
__getattribute__ ,
__hash__ ,
__new__ ,
__reduce__ ,
__reduce_ex__ ,
__repr__ ,
__setattr__ ,
__str__
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