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Duplicating columns into a matrix

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Alexander Engman
Alexander Engman 2018-3-22
编辑： Jan 2018-3-22
Hi!
I think this is very easy to solve, but I simply dont know what is the easiest way. Let's say I have a vector:
A=[1 2 3]
Now I want to repeat this column into a Matrix
B=[1 2 3; 1 2 3; 1 2 3]
How do I go about this?
Thanks in advance.
Alexander

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Birdman
Birdman 2018-3-22
B=repmat(A,3,1)

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Jan
Jan 2018-3-22
编辑：Jan 2018-3-22
Or:
B = A(ones(1,3), :)
This is what happens inside repmat also. It has slightly less overhead, but I'd prefer repmat instead - for unclear reasons.

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