sort 3 column matrix by two key words

2 views (last 30 days)
how to do this in matlab? sort the matrix raws first by the first column, then by the second column?
input = [
1 2 11
1 2 11
1 2 12
1 2 11
1 2 11
1 2 12
1 3 17
1 3 15
1 4 18
1 4 18
1 3 15
1 3 16
2 3 17
2 3 15
1 3 16
1 3 17
1 3 15
1 3 15
1 3 15
1 3 16
1 2 12
1 2 11
1 2 11
1 2 11
1 4 18
1 4 18
1 4 18
2 4 17
2 4 17
1 4 17
1 4 17
1 4 17
]
output = [1 2 11
1 2 11
1 2 12
1 2 11
1 2 11
1 2 12
1 2 12
1 2 11
1 2 11
1 2 11
1 3 17
1 3 15
1 3 15
1 3 16
1 3 16
1 3 17
1 3 15
1 3 15
1 3 15
1 3 16
1 4 18
1 4 18
1 4 18
1 4 18
1 4 18
1 4 17
1 4 17
1 4 17
2 3 17
2 3 15
2 4 17
2 4 17
]

Accepted Answer

Walter Roberson
Walter Roberson on 5 Dec 2017
output sortrows(input, [1 2]);
  1 Comment
HONG CHENG
HONG CHENG on 5 Dec 2017
thanks a lot, this function is what I need.
I also have another question, maybe you are interested in it too
that problem in the link is based on this problem.

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