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(myenv.gcmfaces_dir,filesep,'sample_input',filesep,'testcase_remap.mat');
if ~isempty(dir(fil));
    load(fil);
else;
    help gcmfaces_demo;
    warning('example_remap requires testcase_remap.mat that was not found ... abort');
    return;
end;

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

%%%%%%%%%%%%%%%%%
%load parameters:
%%%%%%%%%%%%%%%%%

nF=5;
fileFormat='compact';
dirGrid=fullfile(myenv.gcmfaces_dir,'..',filesep,'GRID',filesep);

mygrid=[]; grid_load(dirGrid,nF,fileFormat,0);

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;
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;
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;
    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;
    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			fil=fullfile(myenv.gcmfaces_dir,filesep,'sample_input',filesep,'testcase_remap.mat');
9			if ~isempty(dir(fil));
10			load(fil);
11	gforget	1.1	else;
12	gforget	1.2	help gcmfaces_demo;
13			warning('example_remap requires testcase_remap.mat that was not found ... abort');
14	gforget	1.1	return;
15			end;
16
17			if isempty(whos('doRemap3d')); doRemap3d=0; end;
18
19			%%%%%%%%%%%%%%%%%
20			%load parameters:
21			%%%%%%%%%%%%%%%%%
22
23			nF=5;
24			fileFormat='compact';
25			dirGrid=fullfile(myenv.gcmfaces_dir,'..',filesep,'GRID',filesep);
26
27			mygrid=[]; grid_load(dirGrid,nF,fileFormat,0);
28
29			if myenv.verbose>0;
30			gcmfaces_msg('===============================================');
31			gcmfaces_msg(['*** entering example_remap that demonstrate ' ...
32			'the use of gcmfaces_remap_2d and gcmfaces_remap_3d '],'');
33			end;
34
35			warning('off','MATLAB:dsearch:DeprecatedFunction');
36			warning('off','MATLAB:delaunay:DuplicateDataPoints');
37
38			%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
39			%map lon-lat field to gcmfaces
40
41			if myenv.verbose>0;
42			gcmfaces_msg('* map lon-lat field to gcmfaces');
43			end;
44
45			kk=20;%choice of output depth level
46			kkIn=max(find(depth<-mygrid.RC(kk)));% corresponding choice of input level
47
48			%without extrapolation (note: shallow regions are blank in FLD)
49			% ref_remap2d=FLD1(:,:,kkIn);
50			ref_remap2d=fld1(:,:,kk);
51			fld_remap2d=gcmfaces_remap_2d(lon,lat,FLD2(:,:,kkIn),3);
52			fld_remap2d_extrap=gcmfaces_remap_2d(lon,lat,FLD2(:,:,kkIn),3,mygrid.mskC(:,:,kk));
53
54			%extrapolate to fill 3D model domain (note: extrapolation is often a bad idea)
55			if doRemap3d;
56			ref_remap3d=fld1(:,:,kk);
57			fld_remap3d=gcmfaces_remap_3d(lon,lat,depth(kkIn+[-2:2]),FLD2(:,:,kkIn+[-2:2]));
58			fld_repmat3d_kk=fld_remap3d(:,:,kk);
59			end;
60
61			%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
62			%quick display
63			cc=[0.4:0.05:1.1];
64			%
65			if myenv.verbose>0;
66			gcmfaces_msg('* gcmfaces_remap_2d result (without extrapolation)');
67			end;
68			gcmfaces_sphere(fld_remap2d,cc,[],'N',1); title('gcmfaces_remap_2d result ');
69			if myenv.verbose>0;
70			gcmfaces_msg('* gcmfaces_remap_2d result (with extrapolation)');
71			end;
72			gcmfaces_sphere(fld_remap2d_extrap,cc,[],'N',1); title('gcmfaces_remap_2d result (extrapolated)');
73			%
74			if doRemap3d;
75			if myenv.verbose>0;
76			gcmfaces_msg('* original field');
77			end;
78			gcmfaces_sphere(ref_remap2d,cc,[],'N',1); title('original field (slightly different level)');
79			if myenv.verbose>0;
80			gcmfaces_msg('* gcmfaces_remap_3d result (involves extrapolation)');
81			end;
82			gcmfaces_sphere(fld_repmat3d_kk,cc,[],'N',1); title('gcmfaces_remap_3d result');
83			end;
84
85			%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
86			if myenv.verbose>0;
87			gcmfaces_msg('*** leaving example_remap');
88			gcmfaces_msg('===============================================');
89			end;
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