matlab_class/sample_processing/example_interp.m

function []=example_interp(choiceV3orV4);
%object:    a interp2 example within gcmfaces
%inputs:    choiceV3orV4 ('v3' or 'v4') selects the sample GRID

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

gcmfaces_global;
dir0=[myenv.gcmfaces_dir '/sample_input/'];
dirGrid=[dir0 '/GRID' choiceV3orV4  '/'];
dirIn=[dir0 '/SAMPLE' choiceV3orV4  '/'];
if strcmp(choiceV3orV4,'v4'); nF=5; fileFormat='compact'; else; nF=1; fileFormat='straight'; end;
global mygrid; mygrid=[]; grid_load(dirGrid,nF,fileFormat);

%%%%%%%%%%%%%%%%%%%%%%%
%get sample data: V3 SSH
dirV3=[myenv.gcmfaces_dir '/sample_input/SAMPLEv3/'];
etan=rdmds([dirV3 'DDetan'],0); etan(etan==0)=NaN;
dirV3=[myenv.gcmfaces_dir '/sample_input/GRIDv3/'];
lon=rdmds([dirV3 'XC']); lat=rdmds([dirV3 'YC']);

%%%%%%%%%%%%%%%%%%%%%%%
%do the interpolation:
x=[lon-360;lon]; y=[lat;lat]; z=[etan;etan];

z_interp=gcmfaces(5);
for ii=1:mygrid.nFaces;
xi=mygrid.XC{ii}; yi=mygrid.YC{ii};
zi = interp2(x',y',z',xi,yi);
z_interp{ii}=zi;
end;

%%%%%%%%%%%%%%%%%%%%%%%
%illustrate the result:

figure; set(gcf,'Units','Normalized','Position',[0.1 0.3 0.4 0.6]);
x=[lon-360;lon]; y=[lat;lat]; z=[etan;etan];
pcolor(x,y,z); axis([-180 180 -90 90]); shading flat; caxis([-2 1]); colorbar;

figure; set(gcf,'Units','Normalized','Position',[0.5 0.3 0.4 0.6]);
[X,Y,FLD]=convert2pcol(mygrid.XC,mygrid.YC,z_interp);
pcolor(X,Y,FLD); axis([-180 180 -90 90]); shading flat; caxis([-2 1]); colorbar;


1	gforget	1.8	function []=example_interp(choiceV3orV4);
2			%object: a interp2 example within gcmfaces
3			%inputs: choiceV3orV4 ('v3' or 'v4') selects the sample GRID
4	gforget	1.1
5			%%%%%%%%%%%%%%%%%
6			%load parameters:
7			%%%%%%%%%%%%%%%%%
8
9	gforget	1.9	gcmfaces_global;
10			dir0=[myenv.gcmfaces_dir '/sample_input/'];
11	gforget	1.8	dirGrid=[dir0 '/GRID' choiceV3orV4 '/'];
12			dirIn=[dir0 '/SAMPLE' choiceV3orV4 '/'];
13			if strcmp(choiceV3orV4,'v4'); nF=5; fileFormat='compact'; else; nF=1; fileFormat='straight'; end;
14			global mygrid; mygrid=[]; grid_load(dirGrid,nF,fileFormat);
15	gforget	1.1
16			%%%%%%%%%%%%%%%%%%%%%%%
17	gforget	1.2	%get sample data: V3 SSH
18	gforget	1.9	dirV3=[myenv.gcmfaces_dir '/sample_input/SAMPLEv3/'];
19	gforget	1.2	etan=rdmds([dirV3 'DDetan'],0); etan(etan==0)=NaN;
20	gforget	1.9	dirV3=[myenv.gcmfaces_dir '/sample_input/GRIDv3/'];
21	gforget	1.2	lon=rdmds([dirV3 'XC']); lat=rdmds([dirV3 'YC']);
22	gforget	1.1
23			%%%%%%%%%%%%%%%%%%%%%%%
24			%do the interpolation:
25			x=[lon-360;lon]; y=[lat;lat]; z=[etan;etan];
26
27			z_interp=gcmfaces(5);
28	gforget	1.8	for ii=1:mygrid.nFaces;
29	gforget	1.1	xi=mygrid.XC{ii}; yi=mygrid.YC{ii};
30			zi = interp2(x',y',z',xi,yi);
31			z_interp{ii}=zi;
32			end;
33
34			%%%%%%%%%%%%%%%%%%%%%%%
35			%illustrate the result:
36
37			figure; set(gcf,'Units','Normalized','Position',[0.1 0.3 0.4 0.6]);
38			x=[lon-360;lon]; y=[lat;lat]; z=[etan;etan];
39			pcolor(x,y,z); axis([-180 180 -90 90]); shading flat; caxis([-2 1]); colorbar;
40
41			figure; set(gcf,'Units','Normalized','Position',[0.5 0.3 0.4 0.6]);
42			[X,Y,FLD]=convert2pcol(mygrid.XC,mygrid.YC,z_interp);
43			pcolor(X,Y,FLD); axis([-180 180 -90 90]); shading flat; caxis([-2 1]); colorbar;
44
45
46