function a_shuffled=peremesh_matrix(a);

%    for ii=1:n*3
  %      xx=round(random('unif',1,n));
   %     yy=round(random('unif',1,n));
   %     tempp=a(xx,:);
   %     a(xx,:)=a(yy,:);
    %    a(yy,:)=tempp;
    %    xx=round(random('unif',1,col));
    %    yy=round(random('unif',1,col));
    %    tempp=a(:,xx);
    %    a(:,xx)=a(:,yy);
    %    a(:,yy)=tempp;
        
        %    end
a_shuffled=random('unif',min(min(a)),max(max(a)),size(a));