Module cma :: Class ConstRandnShift

Class ConstRandnShift

object --+
         |
        ConstRandnShift

ConstRandnShift()(x) adds a fixed realization of stddev * randn(len(x)) to the vector x.

By default, the realized shift is the same for each instance of ConstRandnShift, see seed argument. This class is used in class FFWrapper.ShiftedFitness as default transformation.

See: class FFWrapper.ShiftedFitness

Instance Methods

[hide private]

__init__(self, stddev=3, seed=1)
with seed=None each instance realizes a different shift source code

__call__(self, x)
return "shifted" x - shift source code

get(self, dimension)
return shift applied to zeros(dimension) source code

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

Properties

[hide private]

Inherited from object: __class__

Method Details

[hide private]

init(self, stddev=3, seed=1)
(Constructor)

source code

with seed=None each instance realizes a different shift

Overrides: object.__init__

Class ConstRandnShift

__init__(self, stddev=3, seed=1) (Constructor)

init(self, stddev=3, seed=1)
(Constructor)