Repeating elements of an array

74 次查看（过去 30 天）
daniel adams
daniel adams 2021-12-3
回答： Dave B 2021-12-3
Say for some . How can I create an array of size which is just i.e repeat the elements of x M times each in a row.
Note I have tried using the reshape function but cant work out how to do it in this case.
  1 个评论
James Tursa
James Tursa 2021-12-3
What have you done so far? What specific problems are you having with your code?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Dave B
Dave B 2021-12-3
Ran in:
There are two really useful repeat functions: repmat and repelem
repelem is good for repeating an element n times, so I think this is what you want. Here I repeat the numbers in a 3 times each:
a=[1 3 7 9];
repelem(a,3)
ans = 1×12
1 1 1 3 3 3 7 7 7 9 9 9
repmat is good when you want to repeat an array of elements, here I repeat a itself 3 times in the row dimension, and 2 times in the column dimension:
repmat(a,3,2)
ans = 3×8
1 3 7 9 1 3 7 9 1 3 7 9 1 3 7 9 1 3 7 9 1 3 7 9

类别

在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 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