Name

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      OPFIT2D

Purpose

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      Calculate orthonormal polynomial fit for 2-d data.

Category

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Calling Sequence

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      zfit = opfit2d( z, xdeg, ydeg, [x, y, c, px, py])

Inputs

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      z = Image to fit. in
      xdeg = Degree of polynomial to use in X direction. in
      ydeg = Degree of polynomial to use in Y direction. in
        X and Y degrees must be greater than 1.
      x = optional vector of independant variable values. in
      y = optional vector of independant variable values. in

Keyword Parameters

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Outputs

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      c = opt. matrix of orthonormal polynomial coef. out
      px = optional vector of orthonormal polynomial values. out
      py = optional vector of orthonormal polynomial values. out
      zfit = 2-d fit to original image. out

Common Blocks

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Notes

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      Notes: Method is based on Forsythe, J. Soc. Indust.
        Appl. Math. 5, 74-88,1957.

Modification History

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      19-MAR-85 -- Initial entry by RBH@APL
      R. Sterner, 29 Mar, 1990 --- converted to SUN.
      R. Sterner, 2010 Jun 07 --- Converted arrays from () to [].
  Copyright (C) 1990, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.