Package parsimony :: Package functions :: Module properties :: Class Gradient

Class Gradient

object --+
         |
        Gradient

Known Subclasses:

Nested Classes

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__metaclass__
Metaclass for defining Abstract Base Classes (ABCs).

Instance Methods

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grad(self, beta)
Gradient of the function.

source code

approx_grad(self, x, eps=0.0001)
Numerical approximation of the gradient.

source code

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __init__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__

Class Variables

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__abstractmethods__ = frozenset(['grad'])

_abc_cache = <_weakrefset.WeakSet object at 0x30d82d0>

_abc_negative_cache = <_weakrefset.WeakSet object at 0x30d8350>

_abc_negative_cache_version = 10

_abc_registry = <_weakrefset.WeakSet object at 0x30d8210>

Properties

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Inherited from object: __class__

Method Details

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grad(self, beta)

source code

Gradient of the function.

Parameters
----------
beta : Numpy array (p-by-1). The point at which to evaluate the
        gradient.

Decorators:

@abc.abstractmethod

approx_grad(self, x, eps=0.0001)

source code

Numerical approximation of the gradient.

Parameters
----------
beta : Numpy array (p-by-1). The point at which to evaluate the
        gradient.

eps : Positive integer. The precision of the numerical solution.
        Smaller is better, but too small may result in floating point
        precision errors.