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gforget |
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function [profOut]=MITprof_resample(profIn,fldIn,filOut,method,varargin); |
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%object: resample a set of fields in file filFldIn with specified time |
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% line timeIn to the positions of profIn and add to file filOut |
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%inputs: profIn is a gcmfaces field (nan-masked; up to N3,N4 dimensions) |
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% fldIn is a description of the fields being resampled including |
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% the corresponding file name and additional specs : |
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% fldIn.name, fldIn.long_name, fldIn.units, fldIn.fil (file |
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% name) and fldIn.tim (time axis specification). Supported |
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% fldIn.tim spec: 'const' (for time invariant climatology), |
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% 'monclim' (for monthly climatology), 'monser' (for monthly |
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% time series) |
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% filOut is the output MITprof file name (if un-specified |
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% the resul may only be returned as a function argument) |
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% method may be 'polygons' (or 'TriScatteredInterp' ... via |
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% gcmfaces_interp_2d in a loop ... to be implemented later) |
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%outputs: profOut is the MITprof structure where the interpolated values |
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% were appended to profIn (if un-specified the result |
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% may only be returned to output file) |
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% |
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%filFldIn is assumed to be 3D and binary at this point |
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gcmfaces_global; |
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doOut=~isempty(who('filOut')); doOutInit=false; |
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if doOut; doOut=~isempty(filOut); end; |
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if doOut; doOutInit=isempty(dir(filOut)); end; |
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if isempty(who('method')); method='polygons'; end; |
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%1) deal with time line |
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if strcmp(fldIn.tim,'monclim'); |
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tim_fld=[-0.5:12.5]; rec_fld=[12 1:12 1]; |
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tmp1=datevec(profIn.prof_date); |
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tmp2=datenum([tmp1(:,1) ones(profIn.np,2) zeros(profIn.np,3)]); |
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tim_prof=(profIn.prof_date-tmp2); |
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tim_prof(tim_prof>365)=365; |
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tim_prof=tim_prof/365*12;%neglecting differences in months length |
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elseif strcmp(fldIn.tim,'const'); |
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tim_fld=[1 2]; rec_fld=[1 2]; |
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tim_prof=1.5*ones(profIn.np,1); |
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else; |
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error('this case remains to be implemented'); |
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end; |
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lon=profIn.prof_lon; lat=profIn.prof_lat; |
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depIn=-mygrid.RC; depOut=profIn.prof_depth; |
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profOut=NaN*ones(profIn.np,profIn.nr); |
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%2) loop over record pairs |
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for tt=1:length(rec_fld)-1; |
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gforget |
1.2 |
fld0=mygrid.mskC.*read_bin(fldIn.fil,rec_fld(tt)); |
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fld1=mygrid.mskC.*read_bin(fldIn.fil,rec_fld(tt+1)); |
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gforget |
1.1 |
ndim=length(size(fld0{1})); |
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fld=cat(ndim+1,fld0,fld1); |
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% |
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ii=find(tim_prof>=tim_fld(tt)&tim_prof<tim_fld(tt+1)); |
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if ~isempty(ii); |
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arr=gcmfaces_interp(fld,lon(ii),lat(ii),'polygons'); |
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arr2=gcmfaces_interp_1d(2,depIn,arr,depOut); |
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end; |
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% |
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k0=floor(tim_prof(ii)); k1=k0+1; |
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a0=tim_prof(ii)-k0; a0=a0*ones(1,profIn.nr); |
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profOut(ii,:)=(1-a0).*arr2(:,:,1)+a0.*arr2(:,:,2); |
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end; |
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%3) deal with file output |
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if doOutInit; |
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%create a header only file to later append resampled fields |
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prof=profIn; |
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tmp1=fieldnames(prof); |
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nt=length(prof.prof_date); |
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nr=length(prof.prof_depth); |
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for ii=1:length(tmp1); |
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tmp2=prod(size(getfield(prof,tmp1{ii}))); |
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if tmp2==nt*nr; prof=rmfield(prof,tmp1{ii}); end; |
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end; |
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MITprof_write(filOut,prof); |
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end; |
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if doOut; |
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%add the array itelf |
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MITprof_addVar(filOut,fldIn.name,'double',{'iDEPTH','iPROF'},profOut); |
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%add its attributes |
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nc=ncopen(filOut,'write'); |
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ncaddAtt(nc,fldIn.name,'long_name',fldIn.long_name); |
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ncaddAtt(nc,fldIn.name,'units',fldIn.units); |
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ncaddAtt(nc,fldIn.name,'missing_value',fldIn.missing_value); |
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ncaddAtt(nc,fldIn.name,'_FillValue',fldIn.FillValue); |
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ncclose(nc); |
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end; |
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%4) deal with argument output |
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if nargout>0; profOut=setfield(profIn,fldIn.name,profOut); end; |
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