/usr/share/ncarg/nclex/ngmath/nm01n.ncl is in libncarg-data 6.3.0-6build1.
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; ;
; Copyright (C) 1997 ;
; University Corporation for Atmospheric Research ;
; All Rights Reserved ;
; ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
; File: nm01n.ncl
;
; Author: Fred Clare (converted to NCL by Mary Haley)
; National Center for Atmospheric Research
; PO 3000, Boulder, Colorado
;
; Date: Mon Dec 15 10:38:27 MST 1997
;
; Description: Simple example of natural neighbor linear interpolation.
;
begin
ISLIM = 6
NumXOut = 21
NumYOut = 21
;
; Define the input data arrays.
;
x = (/0.00, 1.00, 0.00, 1.00, 0.40, 0.75/)
y = (/0.00, 0.00, 1.00, 1.00, 0.20, 0.65/)
z = (/0.00, 0.00, 0.00, 0.00, 1.25, 0.80/)
;
; Define the output grid.
;
xc = 1./(NumXOut-1.)
xo = ispan(0,NumXOut-1,1) * xc
yc = 1./(NumYOut-1.)
yo = ispan(0,NumYOut-1,1) * yc
;
; Do the gridding.
;
out = natgrids(x, y, z, xo, yo)
;
; Create a workstation object.
;
wks_type = "ncgm"
if (str_lower(wks_type).eq."ncgm") then
;
; Create an ncgmWorkstation object.
;
wid = create "natgrids" ncgmWorkstationClass defaultapp
"wkMetaName" : "nm01n.ncgm"
end create
end if
if (str_lower(wks_type).eq."x11") then
;
; Create an X11 workstation.
;
wid = create "natgrids" windowWorkstationClass defaultapp
"wkPause" : "True"
end create
end if
if (str_lower(wks_type).eq."oldps") then
;
; Create an older-style PostScript workstation.
;
wid = create "natgrids" psWorkstationClass defaultapp
"wkPSFileName" : "nm01n.ps"
end create
end if
if (str_lower(wks_type).eq."oldpdf") then
;
; Create an older-style PDF workstation.
;
wid = create "natgrids" pdfWorkstationClass defaultapp
"wkPDFFileName" : "nm01n.pdf"
end create
end if
if (str_lower(wks_type).eq."pdf".or.str_lower(wks_type).eq."ps") then
;
; Create a cairo PS/PDF Workstation object.
;
wid = create "natgrids" documentWorkstationClass defaultapp
"wkFileName" : "nm01n"
"wkFormat" : wks_type
end create
end if
if (str_lower(wks_type).eq."png") then
;
; Create a cairo PNG Workstation object.
;
wid = create "natgrids" imageWorkstationClass defaultapp
"wkFileName" : "nm01n"
"wkFormat" : wks_type
end create
end if
;
; Retrieve the GKS workstation ID so we can use low-level calls to
; draw the surface.
;
getvalues wid
"wkGksWorkId" : gkswid
end getvalues
;
; Draw the surface.
;
drwsrfc(gkswid,xo,yo,out,15.,-25.,90.)
;
; Show how to do the above, only using double precision.
; First we need to remove our float variables and redeclare
; them as double precision.
;
delete(x)
delete(y)
delete(z)
delete(xo)
delete(yo)
delete(out)
;
; Create double precision variables.
;
x = new((/ISLIM/),double)
y = new((/ISLIM/),double)
z = new((/ISLIM/),double)
xo = new((/NumXOut/),double)
yo = new((/NumXOut/),double)
x = (/0.00, 1.00, 0.00, 1.00, 0.40, 0.75/)
y = (/0.00, 0.00, 1.00, 1.00, 0.20, 0.65/)
z = (/0.00, 0.00, 0.00, 0.00, 1.25, 0.80/)
;
; Define the output grid.
;
xc = 1./(NumXOut-1.)
xo = ispan(0,NumXOut-1,1) * xc
yc = 1./(NumYOut-1.)
yo = ispan(0,NumYOut-1,1) * yc
;
; Do the gridding.
;
out = natgridd(x, y, z, xo, yo)
;
; Draw the surface.
;
xp = doubletofloat(xo)
yp = doubletofloat(yo)
outp = doubletofloat(out)
drwsrfc(gkswid,xp,yp,outp,15.,-25.,90.)
frame(wid)
end
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