Package parsimony :: Package functions :: Module penalties

Module penalties

The :mod:`parsimony.functions.penalties` module contains the penalties used to constrain the loss functions. These represent mathematical functions and should thus have properties used by the corresponding algorithms. These properties are defined in :mod:`parsimony.functions.properties`.

Penalties should be stateless. Penalties may be shared and copied and should therefore not hold anything that cannot be recomputed the next time it is called.

Created on Mon Apr 22 10:54:29 2013

Author: Tommy Löfstedt, Vincent Guillemot, Edouard Duchesnay and Fouad Hadj-Selem

License: BSD 3-clause.

Classes

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ZeroFunction

L1
The proximal operator of the L1 function with a penalty formulation

L0
The proximal operator of the "pseudo" L0 function

LInf
The proximal operator of the L-infinity function

L2
The proximal operator of the L2 function with a penalty formulation

L2Squared
The proximal operator of the squared L2 function with a penalty formulation

L1L2Squared
The proximal operator of the L1 function with an L2 constraint.

QuadraticConstraint
The proximal operator of the quadratic function

RGCCAConstraint
Represents the quadratic function

RidgeSquaredError
Represents a ridge squared error penalty, i.e.

LinearVariableConstraint
Represents a linear constraint

SufficientDescentCondition

Variables

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__package__ = 'parsimony.functions'