Message-ID: <4AF06E1E.7090704@acm.org>
Date: 2009-11-03T17:53:34Z
From: Tony Plate
Subject: Create Artificial Binary Matrix based on probability
In-Reply-To: <26160620.post@talk.nabble.com>
> x <- matrix(sample(0:1, 1200, replace=T, prob=c(0.952, 0.048)), ncol=30)
> table(x)
x
0 1
1131 69
> x <- matrix(sample(0:1, 1200, replace=T, prob=c(0.952, 0.048)), ncol=30)
> table(x)
x
0 1
1151 49
>
bikemike42 wrote:
> Dear All,
>
> I am trying to create an artificial binary matrix such that each cell has a
> probability of 0.048 of having a 1. So far the closest I've come is us by
> using a random poisson distribution with a mean of 0.048, but I can't figure
> out how to limit the max value to 1. Otherwise that would work fine it
> seems. Any suggestions?
>
> The main code I've got to create said matrix so far is:
> a<-replicate(26,rpois(57,0.048))
>
> Thanks in Advance,
> Mike