How to copy an array with some left-over indicies also added on?

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Tyler
Tyler 2016-5-3
回答： Azzi Abdelmalek 2016-5-3
I have the following vector I would like to copy:
a = [1;2;3;4;5]
I would like my resulting vector to be
b = [1;2;3;4;5;1;2;3;4;5;1;2;3;4;5;1;2;3]
Where it is [a] 3 times repeated, and then repeats the next 3 indicies of [a], but not the whole vector. The repmat command will not allow me to repeat it by anything other than an integer. Is there a way to specify how many more indicies I want without having to do it manually?
Thanks!

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2016-5-3
You can use repmat
a = [1;2;3;4;5]
b=[repmat(a,3,1); a(1:3)]

更多回答（2 个）

the cyclist
the cyclist 2016-5-3
Here's one way:
b = a(mod(0:17,numel(a))+1)
Fangjun Jiang
Fangjun Jiang 2016-5-3
n=3;
b=cat(1,repmat(a,n,1),a(1:n))

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