%'mask_proj': restrict input fields to a mask region, set to 0 outside %-------------------------------------------------------------------------- % function [ProjData,errormsg]=mask_proj(FieldData,MaskData) %======================================================================= % Copyright 2008-2016, LEGI UMR 5519 / CNRS UGA G-INP, Grenoble, France % http://www.legi.grenoble-inp.fr % Joel.Sommeria - Joel.Sommeria (A) legi.cnrs.fr % % This file is part of the toolbox UVMAT. % % UVMAT is free software; you can redistribute it and/or modify % it under the terms of the GNU General Public License as published % by the Free Software Foundation; either version 2 of the license, % or (at your option) any later version. % % UVMAT is distributed in the hope that it will be useful, % but WITHOUT ANY WARRANTY; without even the implied warranty of % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the % GNU General Public License (see LICENSE.txt) for more details. %======================================================================= function [ProjData,errormsg]=mask_proj(FieldData,MaskData) errormsg='';%default ProjData=FieldData; %% group the variables (fields of 'FieldData') in cells of variables with the same dimensions [CellInfo,NbDimArray,errormsg]=find_field_cells(FieldData); if ~isempty(errormsg) errormsg=['error in proj_field/proj_plane:' errormsg]; return end [Npy,Npx]=size(MaskData.A); for icell=1:numel(CellInfo) if NbDimArray(icell)==2 if isfield(CellInfo{icell},'VarIndex_errorflag') FFName=FieldData.ListVarName{CellInfo{icell}.VarIndex_errorflag}; check_new_error_flag=0; else FFName='FF';%default error (mask) flag name (if not already used) if isfield(FieldData,'FF') ind=1; while isfield(FieldData,['FF_' num2str(ind)]) ind=ind+1; end FFName=['FF_' num2str(ind)];% append an index to the name of error flag, FF_1,FF_2... end ProjData.ListVarName=[FieldData.ListVarName {FFName}]; ProjData.VarAttribute{numel(ProjData.ListVarName)}.Role='errorflag'; check_new_error_flag=1; end switch CellInfo{icell}.CoordType; case 'scattered' XName=FieldData.ListVarName{CellInfo{icell}.Coord_x}; YName=FieldData.ListVarName{CellInfo{icell}.Coord_y}; DX=(MaskData.Coord_x(2)-MaskData.Coord_x(1))/(Npx-1); DY=(MaskData.Coord_y(2)-MaskData.Coord_y(1))/(Npy-1); mask_ind_i=round(0.5+(FieldData.(XName)-MaskData.Coord_x(1))/DX);%nbpoint terms mask_ind_j=round(0.5+(FieldData.(YName)-MaskData.Coord_y(1))/DY);%nbpoint terms checkin=mask_ind_j+Npy*(mask_ind_i-1);%array of mask indices for the nbpoints 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) checkfalse=true(size(FieldData.(XName))); MaskData.A=reshape(MaskData.A,1,[]); checkfalse(MaskData.A(checkin)>200)=0; for ivar=1:numel(CellInfo{icell}.VarIndex) VarName=FieldData.ListVarName{CellInfo{icell}.VarIndex(ivar)}; ProjData.(VarName)(checkfalse)=0; end if check_new_error_flag% an error flag needs to be created in the current cell ProjData.(FFName)=zeros(size(ProjData.(VarName))); ProjData.VarDimName=[FieldData.VarDimName FieldData.VarDimName(CellInfo{icell}.VarIndex(1))]; end ProjData.(FFName)(checkfalse)=1;% update the existing error flag case 'grid' XName=FieldData.ListVarName{CellInfo{icell}.CoordIndex(2)}; YName=FieldData.ListVarName{CellInfo{icell}.CoordIndex(1)}; Var1Name=FieldData.ListVarName{CellInfo{icell}.VarIndex(1)}; [Npy_field,Npx_field]=size(FieldData.(Var1Name)); XArray=linspace(FieldData.(XName)(1),FieldData.(XName)(end),Npx_field); YArray=linspace(FieldData.(YName)(1),FieldData.(YName)(end),Npy_field); XMask=linspace(MaskData.Coord_x(1),MaskData.Coord_x(end),Npx); YMask=linspace(MaskData.Coord_y(1),MaskData.Coord_y(end),Npy); [XMask,YMask]=meshgrid(XMask,YMask); Mask = interp2(XMask,YMask,MaskData.A,XArray,YArray','nearest'); Mask=Mask>200; for ivar=1:numel(CellInfo{icell}.VarIndex) VarName=FieldData.ListVarName{CellInfo{icell}.VarIndex(ivar)}; if ~strcmp(VarName,FFName) ProjData.(VarName)=FieldData.(VarName).*Mask; end end if check_new_error_flag% an error flag needs to be created in the current cell ProjData.(FFName)= ~Mask; ProjData.VarDimName=[FieldData.VarDimName FieldData.VarDimName(CellInfo{icell}.VarIndex(1))]; else ProjData.(FFName)=FieldData.(FFName) | ~Mask; end end end end