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How to Create array with repeating values of another array

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David Quilligan
David Quilligan 2016-1-28
评论： David Quilligan 2016-1-28
Hi I have an array say x = [1 2 3 4 5] generated from previous code. I want to then create an array y = [1 1 2 2 3 3 4 4 5 5] what is the easiest way to accomplish this?

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回答（2 个）

Brendan Hamm
Brendan Hamm 2016-1-28
x = [1 2 3 4 5];
y = repelem(x,2)
y =
1 1 2 2 3 3 4 4 5 5
Titus Edelhofer
Titus Edelhofer 2016-1-28
Hi David,
use repmat and linear indexing:
x = [1 2 3 4 5];
% repeat two times:
xx = repmat(x, 2, 1);
% and access all elements
xRep = xx(:)'
xRep =
1 1 2 2 3 3 4 4 5 5
Titus

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