adjacency to laplacian

              ja[valpt] = e+1;//changed

              //cout<<row_id<<" ______"<<e<<endl;

              //for Laplacian matrix:

              //a[valpt] = (e!=row_id)? -1.0 : static_cast<NodeVal>(degree);

              a[valpt] = (e!=row_id)? -1.0 : static_cast<NodeVal>(degree);

              //for adjacency matrix:

              a[valpt] = (e!=row_id)? 1.0 : 0.0;

              //a[valpt] = (e!=row_id)? 1.0 : 0.0;

              ++valpt;

              //cout<<valpt<<endl;

          }