how to full square matrix first column as second column and so on

first column of full square matrix as second column and second column as third column

 DG2 =

       7.2263       36.234       41.867       36.555
            0       43.326       49.059        36.53
            0            0       6.9689       58.871
            0            0            0       61.001

i need this because

 h = view(biograph(DG2,[],'ShowWeights','on'))
Warning: Self connecting nodes are not allowed, ignoring the diagonal of CM. 
> In biograph.biograph at 158

pls help me