function dat = dspace2struct(filename,version,alternative_struct_name)
% ------------------------------------------------
% dat = dspace2struct(dspacename,version)
% Function to export dSPACE-mat-file to Matlab struct.
% The fieldnames of the struct are the same as the dSPACE-signalnames.
% ------------------------------------------------
% Output:
% dat        ... matlab struct
%
% Input:
% filename   ... (optional) .mat-File generated by dSPACE (string) (
% version    ... (optional) version = 'NG' if using dSpace Next Genertion
% alternative_struct_name ...(optional) needed if structname is different
%                             from filename. Often caused by renaming .mat
%                             files after saving.
%
% author: Alexander Michel
% date: 2010/08/09
%
% changes: - 2011/06/29 Alexander Michel: - customized for dSpace Next
%                                           Generation data structure
%          - 2011/07/29 Alexander Michel: - GUI added when no file is
%                                           provided
%                                         - Path can be provided
%          - 2012/05/02 Alexander Michel: - Bug fixing for dSpace NG naming
%                                           of calculations
%                                         - Multiple XData for dSpace NG
%                                           added
%          - 2013/06/17 Alexander Michel: - Array out for dSpace NG support
%                                           added
%          - 2013/07/11 Alexander Michel: - alternative structname support
%
% Copyright 2012 Thomas K�nig, Alexander Michel
%
% This file is part of NumericPlots.
%
% NumericPlots 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 3 of the License, or
% any later version.
%
% NumericPlots 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 for more details.
%
% You should have received a copy of the GNU General Public License
% along with NumericPlots.  If not, see <http://www.gnu.org/licenses/>.

if(nargin<1 || strcmp(filename,''))
   [fname datapath] = uigetfile('*.mat','choose .mat-file generated by dSPACE');
   filename = fullfile(datapath, fname);
   if isequal(fname,0) || isequal(datapath,0)
       disp('User pressed cancel')
       return;
   else
       disp(['User selected ', filename])
   end
end

if(isempty(strfind(filename,'\')))
   idx1name = 1;
else
   idxes = strfind(filename,'\');
   idx1name = idxes(end)+1;
end

if(nargin>2)
   dspacename = alternative_struct_name;
else
   if(isempty(strfind(filename,'.mat')))
       dspacename = filename(idx1name:end);
   else
       dspacename = filename(idx1name:end-4);
   end
end


if(nargin<2)
   version = 'OG';
end

load(filename);

dspace = eval(genvarname(dspacename));
if(strcmp(version,'NG'))
   for ii = 1:length(dspace.X)
       dat.time{ii} = dspace.X(ii).Data;
   end
else
   dat.time = dspace.X.Data;
end
validx = [];
for ii = 1:length(dspace.Y)
   if(strcmp(version,'NG'))
       if(isempty(dspace.Y(ii).Path))
           newfieldname = dspace.Y(ii).Name;
       else
           stridx = strfind(dspace.Y(ii).Path,'/');
           newfieldname = dspace.Y(ii).Path(stridx(end)+1:end);
       end
   else
       stridx = strfind(dspace.Y(ii).Name,'"');
       lastname = dspace.Y(ii).Name(stridx(end-1)+1:stridx(end)-1);
       stridxM1 = strfind(lastname,'[');
       if(~isempty(stridxM1))
           stridxM2 = strfind(lastname,']');
           if(~isempty(stridxM2))
               validx = sscanf(lastname(stridxM1:stridxM2),'[%i,%i]');
               possiblefieldname = lastname(1:stridxM1-1);
           end
       else
           possiblefieldname = lastname;
       end
       if(isempty(strfind(possiblefieldname,'In1')) && isempty(strfind(possiblefieldname,'Out1')))
           newfieldname = possiblefieldname;
       else
           newfieldname = dspace.Y(ii).Name(stridx(end-3)+1:stridx(end-2)-1);
       end
   end
   if(isvarname(newfieldname) == 0)
       newfieldname = newfieldname(isstrprop(newfieldname,'alphanum'));
       if(isvarname(newfieldname) == 0)
           newfieldname = newfieldname(2:end);
       end
   end
   if(strcmp(version,'NG'))
       if(isfield(dat,newfieldname))
           dat.(newfieldname).Data = [dat.(newfieldname).Data; dspace.Y(ii).Data];
       else
           dat.(newfieldname).Data =  dspace.Y(ii).Data;
       end
       dat.(newfieldname).timeidx = dspace.Y(ii).XIndex;
   else
       if(isempty(validx))
           dat.(newfieldname) = dspace.Y(ii).Data;
       else
           dat.(newfieldname){validx(2)} = dspace.Y(ii).Data;
           validx = [];
       end
   end
end
if(~strcmp(version,'NG'));
   dat.dSPACESettings.Capture = dspace.Capture;
   dat.dSPACESettings.Description = dspace.Description;
   dat.dSPACESettings.RTProgram = dspace.RTProgram;
end

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