vec2Y

 Map 'vectorized' matrix decision variables back to cell array of matrices Y
 by usage of obj.vec2Ymap, see createY1map() for details 
   vec  ... vector of length obj.NYnnz
   Y  ... cell array obj.NY x 1 with filled in 'vec' to the proper nnz places
       Y is returned as symmetric

0001 % Map 'vectorized' matrix decision variables back to cell array of matrices Y
0002 % by usage of obj.vec2Ymap, see createY1map() for details
0003 %   vec  ... vector of length obj.NYnnz
0004 %   Y  ... cell array obj.NY x 1 with filled in 'vec' to the proper nnz places
0005 %       Y is returned as symmetric
0006 function  Y=vec2Y(obj, vec)
0007   
0008   % perhaps skip this?
0009   if (length(vec) ~= obj.NYnnz)
0010     error('map vec->Y, wrong length of vec');
0011   end
0012 
0013   if (obj.NY>0)
0014     Y=cell(obj.NY,1);
0015 
0016     for k=1:obj.NY
0017       % create Y{k} as appropriate
0018       mapper=obj.vec2Ymap{k};
0019       if (mapper.dense)
0020         %Y{k}=zeros(mapper.dim);
0021         %Y{k}(:)=mapper.xmap(vec);
0022         Y{k}=reshape(vec(mapper.xmap),mapper.dim, mapper.dim);
0023       else
0024         % sparse
0025         Y{k}=sparse(mapper.irow, mapper.icol, vec(mapper.xmap), mapper.dim, mapper.dim);
0026         %sparse(i,j,s,m,n)
0027       end
0028     end
0029 
0030   else
0031     Y=[];
0032   end
0033 end