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Re: constructing a matrix from a vector


From: ishi soichi
Subject: Re: constructing a matrix from a vector
Date: Wed, 19 Oct 2011 13:22:47 +0900

Thanks! It worked. Octave is great!

soichi


2011/10/19 James Sherman Jr. <address@hidden>
On Wed, Oct 19, 2011 at 12:02 AM, ishi soichi <address@hidden> wrote:
hi. I have a question about matrices.

say, we have a vector,

(1 2 3)

Can we construct a matrix like


1 2 3
1 2 3
1 2 3
1 2 3

?

certainly it's possible if I use normal loop algorithms. But I rather use Octave capability to manipulate matrices.

soichi

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The function you're looking for is repmat.

In your example, you could do:
repmat([1 2 3], [4 1])

type "help repmat" for more info.

Hope this helps.


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