matlab_class/sample_processing/example_remap.m

function []=example_remap(doRemap3d);
%object:    map a lon-lat field to gcmfaces
%input:     doRemap3d; if set to 1, then demo 3d case (involves
%               extrapolation, and takes a few minutes to compute)

gcmfaces_global;

fil=fullfile(pwd,filesep,'sample_input',filesep,'testcase_remap.mat');
if isempty(dir(fil));
    help gcmfaces_demo;
    warning('skipping example_remap (missing sample_input/testcase_remap.mat)');
    return;
end;

if isempty(whos('doRemap3d')); doRemap3d=0; end;

%%%%%%%%%%%%%%%%%
%load grid:
%%%%%%%%%%%%%%%%%

if isempty(mygrid);
   grid_load;
end;
nF=mygrid.nFaces;

%%%%%%%%%%%%%%%%%
%load test case:
%%%%%%%%%%%%%%%%%

load(fil);

if myenv.verbose>0;
    gcmfaces_msg('===============================================');
    gcmfaces_msg(['*** entering example_remap that demonstrate ' ...
        'the use of gcmfaces_remap_2d and gcmfaces_remap_3d '],'');
end;

warning('off','MATLAB:dsearch:DeprecatedFunction');
warning('off','MATLAB:delaunay:DuplicateDataPoints');

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%map lon-lat field to gcmfaces

if myenv.verbose>0;
    gcmfaces_msg('* map lon-lat field to gcmfaces');
end;

kk=20;%choice of output depth level
kkIn=max(find(depth<-mygrid.RC(kk)));% corresponding choice of input level

%without extrapolation (note: shallow regions are blank in FLD)
% ref_remap2d=FLD1(:,:,kkIn);
ref_remap2d=fld1(:,:,kk);
fld_remap2d=gcmfaces_remap_2d(lon,lat,FLD2(:,:,kkIn),3);
fld_remap2d_extrap=gcmfaces_remap_2d(lon,lat,FLD2(:,:,kkIn),3,mygrid.mskC(:,:,kk));

%extrapolate to fill 3D model domain (note: extrapolation is often a bad idea)
if doRemap3d;
    ref_remap3d=fld1(:,:,kk);
    fld_remap3d=gcmfaces_remap_3d(lon,lat,depth(kkIn+[-2:2]),FLD2(:,:,kkIn+[-2:2]));
    fld_repmat3d_kk=fld_remap3d(:,:,kk);
end;

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%quick display
cc=[0.4:0.05:1.1];
%
if myenv.verbose>0;
    gcmfaces_msg('* gcmfaces_remap_2d result (without extrapolation)');
end;
figureL; gcmfaces_sphere(fld_remap2d,cc,[],'N',1); title('gcmfaces_remap_2d result ');
if myenv.verbose>0;
    gcmfaces_msg('* gcmfaces_remap_2d result (with extrapolation)');
end;
figureL; gcmfaces_sphere(fld_remap2d_extrap,cc,[],'N',1); title('gcmfaces_remap_2d result (extrapolated)');
%
if doRemap3d;
    if myenv.verbose>0;
        gcmfaces_msg('* original field');
    end;
    figureL; gcmfaces_sphere(ref_remap2d,cc,[],'N',1); title('original field (slightly different level)');
    if myenv.verbose>0;
        gcmfaces_msg('* gcmfaces_remap_3d result (involves extrapolation)');
    end;
    figureL; gcmfaces_sphere(fld_repmat3d_kk,cc,[],'N',1); title('gcmfaces_remap_3d result');
end;

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
if myenv.verbose>0;
    gcmfaces_msg('*** leaving example_remap');
    gcmfaces_msg('===============================================');
end;


1	gforget	1.1	function []=example_remap(doRemap3d);
2			%object: map a lon-lat field to gcmfaces
3			%input: doRemap3d; if set to 1, then demo 3d case (involves
4			% extrapolation, and takes a few minutes to compute)
5
6	gforget	1.2	gcmfaces_global;
7
8	gforget	1.3	fil=fullfile(pwd,filesep,'sample_input',filesep,'testcase_remap.mat');
9			if isempty(dir(fil));
10	gforget	1.2	help gcmfaces_demo;
11	gforget	1.4	warning('skipping example_remap (missing sample_input/testcase_remap.mat)');
12	gforget	1.1	return;
13			end;
14
15			if isempty(whos('doRemap3d')); doRemap3d=0; end;
16
17			%%%%%%%%%%%%%%%%%
18	gforget	1.3	%load grid:
19	gforget	1.1	%%%%%%%%%%%%%%%%%
20
21	gforget	1.3	if isempty(mygrid);
22			grid_load;
23			end;
24			nF=mygrid.nFaces;
25
26			%%%%%%%%%%%%%%%%%
27			%load test case:
28			%%%%%%%%%%%%%%%%%
29	gforget	1.1
30	gforget	1.3	load(fil);
31	gforget	1.1
32			if myenv.verbose>0;
33			gcmfaces_msg('===============================================');
34			gcmfaces_msg(['*** entering example_remap that demonstrate ' ...
35			'the use of gcmfaces_remap_2d and gcmfaces_remap_3d '],'');
36			end;
37
38			warning('off','MATLAB:dsearch:DeprecatedFunction');
39			warning('off','MATLAB:delaunay:DuplicateDataPoints');
40
41			%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
42			%map lon-lat field to gcmfaces
43
44			if myenv.verbose>0;
45			gcmfaces_msg('* map lon-lat field to gcmfaces');
46			end;
47
48			kk=20;%choice of output depth level
49			kkIn=max(find(depth<-mygrid.RC(kk)));% corresponding choice of input level
50
51			%without extrapolation (note: shallow regions are blank in FLD)
52			% ref_remap2d=FLD1(:,:,kkIn);
53			ref_remap2d=fld1(:,:,kk);
54			fld_remap2d=gcmfaces_remap_2d(lon,lat,FLD2(:,:,kkIn),3);
55			fld_remap2d_extrap=gcmfaces_remap_2d(lon,lat,FLD2(:,:,kkIn),3,mygrid.mskC(:,:,kk));
56
57			%extrapolate to fill 3D model domain (note: extrapolation is often a bad idea)
58			if doRemap3d;
59			ref_remap3d=fld1(:,:,kk);
60			fld_remap3d=gcmfaces_remap_3d(lon,lat,depth(kkIn+[-2:2]),FLD2(:,:,kkIn+[-2:2]));
61			fld_repmat3d_kk=fld_remap3d(:,:,kk);
62			end;
63
64			%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
65			%quick display
66			cc=[0.4:0.05:1.1];
67			%
68			if myenv.verbose>0;
69			gcmfaces_msg('* gcmfaces_remap_2d result (without extrapolation)');
70			end;
71	gforget	1.5	figureL; gcmfaces_sphere(fld_remap2d,cc,[],'N',1); title('gcmfaces_remap_2d result ');
72	gforget	1.1	if myenv.verbose>0;
73			gcmfaces_msg('* gcmfaces_remap_2d result (with extrapolation)');
74			end;
75	gforget	1.5	figureL; gcmfaces_sphere(fld_remap2d_extrap,cc,[],'N',1); title('gcmfaces_remap_2d result (extrapolated)');
76	gforget	1.1	%
77			if doRemap3d;
78			if myenv.verbose>0;
79			gcmfaces_msg('* original field');
80			end;
81	gforget	1.5	figureL; gcmfaces_sphere(ref_remap2d,cc,[],'N',1); title('original field (slightly different level)');
82	gforget	1.1	if myenv.verbose>0;
83			gcmfaces_msg('* gcmfaces_remap_3d result (involves extrapolation)');
84			end;
85	gforget	1.5	figureL; gcmfaces_sphere(fld_repmat3d_kk,cc,[],'N',1); title('gcmfaces_remap_3d result');
86	gforget	1.1	end;
87
88			%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
89			if myenv.verbose>0;
90			gcmfaces_msg('*** leaving example_remap');
91			gcmfaces_msg('===============================================');
92			end;
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