Concatenate matrix with for loop
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Hi guys,
I got 3 matrices that I want to concatenate into one. Each matrix is 4x200. What I want to do is to create a matrix that is like matrix c:
a =
8 1 6 5
3 5 7 6
4 9 2 7
b =
5 4 1 3
7 3 2 8
8 9 6 6
c = [a(:,1) b(:,1);a(:,2) b(:,2);a(:,3) b(:,3);a(:,4) b(:,4)]
c =
8 5
3 7
4 8
1 4
5 3
9 9
6 1
7 2
2 6
5 3
6 8
7 6
I want to use a for loop but I couldn't get it to work. Your help will be appreciated. Thank you!
采纳的回答
Star Strider
2018-2-21
Try this:
c = [a(:) b(:)];
4 个评论
Star Strider
2018-2-21
As always, my pleasure!
Probably the easiest way is to create ‘v’ as a matrix, then concatenate it with the others:
v = repmat((1:size(a,1))', 1, size(a,2));
c = [v(:) a(:) b(:)];
Note the transpose operator ('). This creates ‘(1:size(a,1))’ as a column vector, necessary for the correct matrix creation.
This version of ‘v’ should work with any matrix ‘a’, since it is defined by the size dimensions of ‘a’.
Catherine
2018-2-21
Star Strider
2018-2-21
As always, my pleasure!
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