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repeat an element in a vector

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Sehoon Chang
Sehoon Chang 2020-3-27
编辑： Birdman 2020-3-27
Hi all,
I have one vector and i wish to repeat the first element of the vector once at the very beginning.
For example:
n = [1 2 3 4 5 6 7 8 9]
to
n = [1 1 2 3 4 5 6 7 8 9]
Thank you all.

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采纳的回答

Birdman
Birdman 2020-3-27
编辑：Birdman 2020-3-27
[n(1) n]
or
[repmat(n(1),1) n]

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