Repeat copies of array elements using for loop/while

3 次查看（过去 30 天）
Juan Pérez Álvarez
回答： Image Analyst 2022-2-27
Hi, I need create a code where the elements of an array are repeat:
For example:
% Create a simple vector:
for i =1:4
Vec(i) = i;
end
Vec = [1,2,3,4];
If I need repeat the elements of this vector 2 times:
Vec = [1,1,2,2,3,3,4,4];
3 times:
Vec = [1,1,1,2,2,2,3,3,3,4,4,4];
I know using the function: repelem; I can get this result but I need do it using a for loop/while.
¿Any idea?
  6 个评论
显示 4更早的评论
Juan Pérez Álvarez
Juan Pérez Álvarez 2022-2-27
编辑：Image Analyst 2022-2-27
Finally I figured out. Thank you. Got it:
for i =1:4
Vec((2*i)-1:i*2) = i;
end

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Image Analyst
Image Analyst 2022-2-27
I'd do it slightly differently:
Vec = 1 : 4;
n = 3; % Number of times to repeat each element of Vec
Vec2 = zeros(1, 2 * length(Vec));
for k = 1 : length(Vec)
index1 = (k-1) * n + 1;
index2 = index1 + n - 1;
Vec2(index1 : index2) = Vec(k);
end
Vec2

更多回答（0 个）

类别

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

标签

产品


版本

R2020b

Community Treasure Hunt

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

Start Hunting!

Translated by