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class Triweight( Kernel )	[source]

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

  K( x ) = ( 1 - x² )³ if |x| < 1 else 0

Triweight( )	[source]

Constructor.

Using
     integral = 32.0/35.0
     fwhm = 0.908404

result( x )	[source]

Return the result for input values.

Parameters

• x : array-like
       input values

resultsq( xsq )	[source]

Return the result for squared input values.

Parameters

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

partial( x )	[source]

Return the partial derivative wrt the input values.

Parameters

• x : array-like
       the input values

isBound( )	[source]

Return True

name( )	[source]

Return the name of the kernel

Methods inherited from Kernel