[646] | 1 | %'mask_proj': restrict input fields to a mask region, set to 0 outside
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[639] | 2 | %--------------------------------------------------------------------------
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[646] | 3 | % function [ProjData,errormsg]=mask_proj(FieldData,MaskData)
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[809] | 4 |
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| 5 | %=======================================================================
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[924] | 6 | % Copyright 2008-2016, LEGI UMR 5519 / CNRS UGA G-INP, Grenoble, France
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[809] | 7 | % http://www.legi.grenoble-inp.fr
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| 8 | % Joel.Sommeria - Joel.Sommeria (A) legi.cnrs.fr
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[639] | 9 | %
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| 10 | % This file is part of the toolbox UVMAT.
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[809] | 11 | %
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[639] | 12 | % UVMAT is free software; you can redistribute it and/or modify
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[809] | 13 | % it under the terms of the GNU General Public License as published
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| 14 | % by the Free Software Foundation; either version 2 of the license,
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| 15 | % or (at your option) any later version.
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| 16 | %
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[639] | 17 | % UVMAT is distributed in the hope that it will be useful,
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| 18 | % but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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[809] | 20 | % GNU General Public License (see LICENSE.txt) for more details.
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| 21 | %=======================================================================
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[639] | 22 |
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| 23 | function [ProjData,errormsg]=mask_proj(FieldData,MaskData)
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| 24 | errormsg='';%default
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| 25 | ProjData=FieldData;
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| 26 |
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| 27 |
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| 28 | %% group the variables (fields of 'FieldData') in cells of variables with the same dimensions
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| 29 | [CellInfo,NbDimArray,errormsg]=find_field_cells(FieldData);
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| 30 | if ~isempty(errormsg)
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| 31 | errormsg=['error in proj_field/proj_plane:' errormsg];
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| 32 | return
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| 33 | end
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| 34 | [Npy,Npx]=size(MaskData.A);
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[675] | 35 |
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[639] | 36 | for icell=1:numel(CellInfo)
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| 37 | if NbDimArray(icell)==2
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[672] | 38 | if isfield(CellInfo{icell},'VarIndex_errorflag')
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| 39 | FFName=FieldData.ListVarName{CellInfo{icell}.VarIndex_errorflag};
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[675] | 40 | check_new_error_flag=0;
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[672] | 41 | else
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| 42 | FFName='FF';%default error (mask) flag name (if not already used)
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| 43 | if isfield(FieldData,'FF')
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| 44 | ind=1;
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| 45 | while isfield(FieldData,['FF_' num2str(ind)])
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| 46 | ind=ind+1;
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| 47 | end
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| 48 | FFName=['FF_' num2str(ind)];% append an index to the name of error flag, FF_1,FF_2...
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| 49 | end
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| 50 | ProjData.ListVarName=[FieldData.ListVarName {FFName}];
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[675] | 51 | ProjData.VarAttribute{numel(ProjData.ListVarName)}.Role='errorflag';
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| 52 | check_new_error_flag=1;
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[672] | 53 | end
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[639] | 54 | switch CellInfo{icell}.CoordType;
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[675] | 55 | case 'scattered'
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| 56 | XName=FieldData.ListVarName{CellInfo{icell}.Coord_x};
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| 57 | YName=FieldData.ListVarName{CellInfo{icell}.Coord_y};
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[782] | 58 | DX=(MaskData.Coord_x(2)-MaskData.Coord_x(1))/(Npx-1);
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| 59 | DY=(MaskData.Coord_y(2)-MaskData.Coord_y(1))/(Npy-1);
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| 60 | mask_ind_i=round(0.5+(FieldData.(XName)-MaskData.Coord_x(1))/DX);%nbpoint terms
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| 61 | mask_ind_j=round(0.5+(FieldData.(YName)-MaskData.Coord_y(1))/DY);%nbpoint terms
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[639] | 62 | checkin=mask_ind_j+Npy*(mask_ind_i-1);%array of mask indices for the nbpoints
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| 63 | checkin=checkin(mask_ind_i>=1 & mask_ind_i<=Npx & mask_ind_j>=1 & mask_ind_j<=Npy);%reduced array of mask indices (inside the image)
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| 64 | checkfalse=true(size(FieldData.(XName)));
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| 65 | MaskData.A=reshape(MaskData.A,1,[]);
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| 66 | checkfalse(MaskData.A(checkin)>200)=0;
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| 67 | for ivar=1:numel(CellInfo{icell}.VarIndex)
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| 68 | VarName=FieldData.ListVarName{CellInfo{icell}.VarIndex(ivar)};
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[672] | 69 | ProjData.(VarName)(checkfalse)=0;
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[639] | 70 | end
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[675] | 71 | if check_new_error_flag% an error flag needs to be created in the current cell
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[672] | 72 | ProjData.(FFName)=zeros(size(ProjData.(VarName)));
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[675] | 73 | ProjData.VarDimName=[FieldData.VarDimName FieldData.VarDimName(CellInfo{icell}.VarIndex(1))];
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[672] | 74 | end
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[675] | 75 | ProjData.(FFName)(checkfalse)=1;% update the existing error flag
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[639] | 76 | case 'grid'
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[675] | 77 | XName=FieldData.ListVarName{CellInfo{icell}.CoordIndex(2)};
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| 78 | YName=FieldData.ListVarName{CellInfo{icell}.CoordIndex(1)};
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[639] | 79 | Var1Name=FieldData.ListVarName{CellInfo{icell}.VarIndex(1)};
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| 80 | [Npy_field,Npx_field]=size(FieldData.(Var1Name));
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[675] | 81 | XArray=linspace(FieldData.(XName)(1),FieldData.(XName)(end),Npx_field);
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| 82 | YArray=linspace(FieldData.(YName)(1),FieldData.(YName)(end),Npy_field);
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[782] | 83 | XMask=linspace(MaskData.Coord_x(1),MaskData.Coord_x(end),Npx);
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| 84 | YMask=linspace(MaskData.Coord_y(1),MaskData.Coord_y(end),Npy);
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[639] | 85 | [XMask,YMask]=meshgrid(XMask,YMask);
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| 86 | Mask = interp2(XMask,YMask,MaskData.A,XArray,YArray','nearest');
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[672] | 87 | Mask=Mask>200;
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[639] | 88 | for ivar=1:numel(CellInfo{icell}.VarIndex)
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| 89 | VarName=FieldData.ListVarName{CellInfo{icell}.VarIndex(ivar)};
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[672] | 90 | if ~strcmp(VarName,FFName)
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| 91 | ProjData.(VarName)=FieldData.(VarName).*Mask;
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| 92 | end
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[639] | 93 | end
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[675] | 94 | if check_new_error_flag% an error flag needs to be created in the current cell
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| 95 | ProjData.(FFName)= ~Mask;
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| 96 | ProjData.VarDimName=[FieldData.VarDimName FieldData.VarDimName(CellInfo{icell}.VarIndex(1))];
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| 97 | else
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[672] | 98 | ProjData.(FFName)=FieldData.(FFName) | ~Mask;
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| 99 | end
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[639] | 100 | end
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| 101 | end
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| 102 | end
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| 103 |
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[672] | 104 |
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