How tp join multiple matrices in one matrix
显示 更早的评论
Assume matrix A1, A2 and A3 as follows:
A1 = [
1 10 23
2 12 45
3 23 43
4 32 45
5 32 32
];
A2 = [
1 43 10
2 56 11
3 34 24
4 43 65
];
A3 = [
1 32 12
2 22 21
];
I want to join all of these matrices into one matrix A according to the unique ID number (first column in every matrix). For example, all row with ID = 1 in all three matrices should written first, then all ID = 2, then all ID = 3, and so on.
A = [
1 10 23
1 43 10
1 32 12
2 12 45
2 56 11
2 22 21
3 23 43
3 34 24
4 32 45
4 43 65
];
采纳的回答
Star Strider
2017-5-21
Use the sortrows function on the vertically concatenated matrices:
A = sortrows([A1; A2; A3], 1)
A =
1 10 23
1 43 10
1 32 12
2 12 45
2 56 11
2 22 21
3 23 43
3 34 24
4 32 45
4 43 65
5 32 32
Experiment to get the result you want. To eliminate the last row, the assignment becomes:
A = A(1:end-1,:);
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Matrices and Arrays 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
