/usr/share/gnudatalanguage/lib/bilinear.pro is in libgnudatalanguage0 0.9.7-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | ; part of GNU Data Language - GDL
;-------------------------------------------------------------
;+
; NAME:
; BILINEAR
; PURPOSE:
; Bilinearly regrid a 2D array on a set of x,y coordinates
; CATEGORY:
; Array Manipulation.
; CALLING SEQUENCE:
; z2 = bilinear(z,x,y,missing=missing)
; INPUTS:
; Z = input 2-d array. in
; X, Y : X and Y index positions where Z2 is to be estimated
; from Z
; missing: value for points falling outside the z boundaries
; KEYWORD PARAMETERS:
; none
; OUTPUTS:
; z2 = resulting array. out
;
; PROCEDURE:
; Uses INTERPOLATE /GRID
;
; MODIFICATION HISTORY:
; Written by: 2011-12-17 G. Duvert (Initial import)
;
;-
; LICENCE:
; Copyright (C) 2011
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
;-
;
function BILINEAR, z, x, y, missing=missing
;
ON_ERROR, 2 ;Return to caller if error
;
if (N_PARAMS() ne 3) then MESSAGE, 'Incorrect number of arguments.'
;
dimx=SIZE(x,/n_dimensions)
dimy=SIZE(y,/n_dimensions)
;
if ((dimx gt 2) || (dimy gt 2)) then MESSAGE, 'X and Y must be 1D or 2D, max.'
if ( dimx ne dimy ) then MESSAGE, 'X and Y must be of same dimension(s).'
;
if ((dimx eq 1) && (dimy eq 1)) then begin
return, INTERPOLATE(z, x, y, /GRID, missing=missing)
endif else begin
return, INTERPOLATE(z, x, y, missing=missing)
endelse
;
end
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