Copying a matrix into another larger matrix multiple times

6 次查看（过去 30 天）
Olu adroit
Olu adroit 2016-1-12
编辑： Stephen23 2016-1-12
Hi all, I am trying to write a script that creates a larger matrix B from a smaller matrix A = [1;1;1;2;2;2;3;3;3;4;4;4] whereby A is copied into B in N times. E.g if N = 4, B = [1;1;1;2;2;2;3;3;3;4;4;4;1;1;1;2;2;2;3;3;3;4;4;4;1;1;1;2;2;2;3;3;3;4;4;4;1;1;1;2;2;2;3;3;3;4;4;4]. Thank you for your help in advance.
Adroit

请先登录，再回答此问题。

采纳的回答

Stephen23
Stephen23 2016-1-12
编辑：Stephen23 2016-1-12
You don't need to reinvent the wheel using slow and inefficient nested loops, just use repmat:
>> A = [1,2,3,4];
>> B = repmat(A(:),4,1)
B =
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
>> BB = repmat({A},4,4);
If a cell contains an array with more than one element, then it shows a summary of that array:
>> X = {5}
X =
[5]
>> X = {5:6}
X =
[1x2 double]
but the data is still all there!:
>> X{1}
ans = 5 6

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Structures 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by