Message-ID: <47C1BC9E.2080005@statistik.tu-dortmund.de>
Date: 2008-02-24T18:51:10Z
From: Uwe Ligges
Subject: Split a matrix for mixture distribution
In-Reply-To: <15663106.post@talk.nabble.com>
Evgenia wrote:
> Hello,
> I have a matrix with 4000 rows and 8 columns with 1 and zeros
> Every 1000 rows comes for a different rule, f1,f2,f3,f4.
>
> 1 1 1 1 0 0 0 0
> 1 1 1 1 0 0 0 0
> ....
> 0 0 0 0 1 1 1 1
> 0 0 0 0 1 1 1 1
> ...
> 1 1 0 0 1 1 0 0
> 1 1 0 0 1 1 0 0
> ...
> 0 0 1 1 0 0 1 1
> 0 0 1 1 0 0 1 1
>
> How can I extract 4 matrices each one containes 1000 elements from a certain
> rule,since i want to
> a) choose between f1, f2, f3 and f4 at random according to the
> probabilities p1, p2, p3 ,p4 (it is assumed p1+p2+p3=1).
> b) sample 1 value from whichever of f1, f2, f3 ,f4 was chosen
I guess we need some better explanations or examples - at least I do not
understand your aims.
Uwe Ligges
> Thanks a lot
> Evgenia
>