Sorting array by second column to first

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First Last 2022-2-1
编辑： First Last 2022-2-1
Hello Guys,
i have a problem to sort my array.
Its an unsorted array, which rows need to be sortet.
The value of the first row in the second column, needs to be the first value of the second row in the first column.
Example:
unsortet:
2 3
1 2
4 1
6 7
3 6
7 10
sortet:
1 2
2 3
3 6
6 7
7 10
10....
I would realy appreciate it, if you can help me :)

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回答（1 个）

Benjamin Thompson
Here is one way to do matrix sorting. Your description is a little confusing, but hopefully from this you see the general approach using the sort function.
>> A = [2 3; 1 2; 4 1; 6 7; 3 6; 7 10]
A =
2 3
1 2
4 1
6 7
3 6
7 10
>> [B, I] = sort(A(:,1))
B =
1
2
3
4
6
7
I =
2
1
5
3
4
6
>> Asorted = A(I,:)
Asorted =
1 2
2 3
3 6
4 1
6 7
7 10

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