MATLAB: How to sort a matrix based on two columns

arrayMATLABmatrixsort

Assume matrix A as follows:
A = [
1  1  20
1  2  32
1  3  10
2  1  45
2  2  10
2  3  15
3  1  43
3  2  90
];
I want to sort matrix A based on the third column. However, I want to keep the first column also sorted. Whenever the ID changed, then column 3 is sorted. The output should be something likes:
B = [
1  3  10
1  1  20
1  2  32
2  2  10
2  3  15
2  1  45
3  1  43
3  2  90
];

Best Answer

>> sortrows(A,[1 3 2])          % doc sortrows for details...
ans =
   1     3    10
   1     1    20
   1     2    32
   2     2    10
   2     3    15
   2     1    45
   3     1    43
   3     2    90
>>
Related Question