# How to vertically combine two matrices with a space in-between them?

조회 수: 4 (최근 30일)
Jimmy Neutron 2021년 6월 16일
댓글: Stephen23 2021년 6월 16일
I am working with a ton of the same matrices that I want to save into an excel file with two blank lines of cells separating all of them. In this case I will use three. I tried vertcat, but I get an error that the dimensions are not consistent... I don't understand why it should be a problem if the have the same number of columns...
A = [ 1 2 3 4; 5 6 7 8; 3 2 4 5]
B = [ 6 3 2 1, 5 6 4 6, 7 8 1 2 ]
C = [ 5 4 1 2; 5 9 5 6; 4 1 2 1]
I would like to achieve a single matrix that looks like this:
1 2 3 4
5 6 7 8
3 2 4 5
6 3 2 1
5 6 4 6
7 8 1 2
5 4 1 2
5 9 5 6
4 1 2 1
How would I go about iterating and joining the matrices in a loop?
##### 댓글 수: 1이전 댓글 -1개 표시이전 댓글 -1개 숨기기
Stephen23 2021년 6월 16일
"I tried vertcat, but I get an error that the dimensions are not consistent... I don't understand why it should be a problem if the have the same number of columns"
They don't have the same number of columns:
B = [ 6 3 2 1, 5 6 4 6, 7 8 1 2 ]
% ^ ^
Actually checking the sizes is much more reliable than relying on what you think/hope their sizes are.

댓글을 달려면 로그인하십시오.

### 채택된 답변

Chunru 2021년 6월 16일
편집: Chunru 2021년 6월 16일
You can insert one row of NaN. An array or matrix must be filled with numbers and cannot have blanks (unless you use strings). NaNs are also considered as numbers and they can be put into an array or matrix.
A = [ 1 2 3 4; 5 6 7 8; 3 2 4 5];
B = [ 6 3 2 1; 5 6 4 6; 7 8 1 2 ];
C = [ 5 4 1 2; 5 9 5 6; 4 1 2 1];
D =[A; nan(1,4); B; nan(1,4); C]
D = 11×4
1 2 3 4 5 6 7 8 3 2 4 5 NaN NaN NaN NaN 6 3 2 1 5 6 4 6 7 8 1 2 NaN NaN NaN NaN 5 4 1 2 5 9 5 6

댓글을 달려면 로그인하십시오.

### 카테고리

Help CenterFile Exchange에서 Creating and Concatenating Matrices에 대해 자세히 알아보기

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by