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class Parabola( Kernel )	Source

Parabola is a Kernel function between [-1,1]; it is 0 elsewhere.

  K( x ) = ( 1-x² ) if |x| < 1 else 0

Parabola( )

Constructor.

  Using
  integral = 4.0/3.0
  fwhm = 2 sqrt( 0.5 )

result( x )

Return the result for input values.

Parameters

• x : array-like
       input values

resultsq( xsq )

Return the result for squared input values.

Parameters

• x : array-like
       the squares of the input values

partial( x )

Return the partial derivative wrt the input values.

Parameters

• x : array-like
       the input values

isBound( )

Return True

name( )

Return the name of the kernel

Methods inherited from Kernel