Class TransformSearchSpace

source code

                     object --+    
                              |    
FFWrapper.FitnessTransformation --+
                                  |
                                 FFWrapper.TransformSearchSpace

Known Subclasses:

• RotatedFitness
• , FixVariables
• , ShiftedFitness
• , ScaleCoordinates

f = TransformSearchSpace(f, ConstRandnShift())

constructs the composed function f <- f o shift.

Details: to some extend this is a nice shortcut for:

f = lambda x, *args: f_in(ConstRandnShift()(x), *args)

however the lambda definition depends on the value of f_in even after f has been assigned.

See: ShiftedFitness, RotatedFitness

>>> import cma
>>> f0 = lambda x: sum(x)
>>> shift_fct = cma.ConstRandnShift()
>>> f = cma.FF2.TransformSearchSpace(f0, shift_fct)
>>> x = [1, 2, 3]
>>> assert f(x) == f0(shift_fct(x))