sorting a matrix in descending order

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?

 Risposta accettata

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.

Più risposte (1)

bym
bym il 21 Apr 2012
sort(group,1,'descend')

3 Commenti

I don't think this method retains the integrity of the rows, but rather sorts the columns independently.
Can I use this descend command to arrange any array or matrix in descending order?I am using mesh command to create a curve.Mesh command creates origin of the curve between X-Y plane by default.I want to change the origin from X-Y plane to Y-Z plane and X axis I want to arrange in descending order,I am stuck here,can anyone help?
I suggest you make a new question, with more detail and maybe a small example. Questions buried in comments don't get seen as much.

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