MATLAB: Sorting a matrix in descending order

MATLABsort

I have a matrix
group =
     0     0     0     1
     0     1     0     0
     0     0     1     0
     0     1     0     0
     0     0     0     1
     0     0     1     0
     0     0     1     0
     0     1     0     0
     0     0     0     1
     0     1     0     0
     1     0     0     0
     0     1     0     0
if I want to sort in ascending order I can use
sortrows(group)
ans =
     0     0     0     1
     0     0     0     1
     0     0     0     1
     0     0     1     0
     0     0     1     0
     0     0     1     0
     0     1     0     0
     0     1     0     0
     0     1     0     0
     0     1     0     0
     0     1     0     0
     1     0     0     0
but I want to sort in descending order. What to do?

Best Answer

You can use a second input argument. By omitting it, you have effectively used
sortrows(group,[1 2 3 4])
for the ascending case. I believe what you want for the descending case is
sortrows(group,[-1 -2 -3 -4])
but you should verify that the result.
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