Radial Basis Function - RBF Types

RBF Types

Commonly used types of radial basis functions include (writing ):

  • Gaussian:

The first term, that is used for normalisation of the Gaussian, is missing, because in our sum every Gaussian has a weight, so the normalisation is not necessary.

  • Multiquadric:
  • Inverse quadratic:
  • Inverse multiquadric:
  • Polyharmonic spline:
  • Thin plate spline (a special polyharmonic spline):

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