/usr/share/ncarg/nclex/ngmath/nm17n.ncl is in libncarg-data 6.3.0-6build1.
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; ;
; Copyright (C) 1998 ;
; University Corporation for Atmospheric Research ;
; All Rights Reserved ;
; ;
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;
; File: nm17n.ncl
;
; Author: Fred Clare
; National Center for Atmospheric Research
; PO 3000, Boulder, Colorado
;
; Date: Wed Dec 2 17:17:40 MST 1998
;
; Description: This program illustrates the use of csa3s.
;
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load "$NCARG_ROOT/lib/ncarg/nclex/gsun/gsn_code.ncl"
begin
;
; Create the input arrays.
;
xmin = -2.
xmax = 2.
ymin = -2.
ymax = 2.
zmin = -2.
zmax = 2.
nx = 21
ny = 21
nz = 21
ndata = 1000
xi = xmin + (xmax-xmin) * random_uniform(0.,1.0,ndata)
yi = ymin + (ymax-ymin) * random_uniform(0.,1.0,ndata)
zi = zmin + (zmax-zmin) * random_uniform(0.,1.0,ndata)
ui = xi*xi + yi*yi + zi*zi
;
; Set up the output grid.
;
xo = fspan(xmin,xmax,nx)
yo = fspan(ymin,ymax,ny)
zo = fspan(zmin,zmax,nz)
;
; Interpolate.
;
knots = (/4,4,4/)
uo = csa3s(xi,yi,zi,ui,knots,xo,yo,zo)
;
; Create workstation object.
;
wks_type = "ncgm"
wid = gsn_open_wks(wks_type,"nm17n")
;
; Draw an isosurface plot of the approximated function at isovalue = 3.
;
rho = 2.
theta = -35.
phi = 65.
tdez3d(wid, xo, yo, zo, uo, 3.0, rho, theta, phi, 6)
frame(wid)
end
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