How to swap row elements by increasing and decresing order.

 p = [30 30 30 30 30 30 0 0 0 0 0 0 0 0 30 30 30 30 30 30]

I want to swap it like [30 30 30 30 30 30 30 30 30 30 30 30 0 0 0 0 0 0 0 0];

 Np = length(M);

   for p = Np/2: -1:2
        for CP = p-1:-1:1
            if M(1,CP) ~= M(1,CP+1) 
                M(1,CP) = M(1,CP+1)

            end
        end
   end

Answer 1

[Walter Roberson]

sort(p, 'descending')

[Triveni]

 sort(p, 'descend')

Thanks

[Triveni]

Can you generate it by algorithm which i've tried??? by swap & interchange , store generated swaps.