Sorting 2D matrix

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Naga Alapati
Naga Alapati on 4 Nov 2015
Commented: dpb on 5 Nov 2015
Hello all,
I'm troubling with sorting of the matrix. I have a matrix
A = 6.0000 18.0000 20.0000 23.0000 26.0000
3.1464 1.4302 2.9512 0.9988 2.7403
I need to sort the second row in ascending order. Simultaneously the first row also needs to be sorted according to the second row like
required matrix = 23.0000 18.0000 26.0000 20.0000 6.0000
0.9988 1.4302 2.7403 2.9512 3.1464
when I trying to use the sort command like sort(A,2), I'm getting
sort(A,2)=
6.0000 18.0000 20.0000 23.0000 26.0000
0.9988 1.4302 2.7403 2.9512 3.1464
Can you help me here. Thank you.

Accepted Answer

dpb
dpb on 4 Nov 2015
>> sortrows(A.',2).'
ans =
23.0000 18.0000 26.0000 20.0000 6.0000
0.9988 1.4302 2.7403 2.9512 3.1464
>>
  2 Comments
Naga Alapati
Naga Alapati on 4 Nov 2015
Thank you. It works
dpb
dpb on 5 Nov 2015
Indeed! :) Converts the rows to columns since sortrows is limited to selecting columns by which to do the sorting.
The brute force way w/ sort would be two steps...
[~,ix]=sort(A(2,:)); % get the indices for sorting 2nd row
A=A(:,ix); % rearrange all by the column order

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