On May 12, 2011, at 5:02 AM, Alexander Engelhardt wrote:
Am 12.05.2011 10:46, schrieb blutack:
Hi, I need to create a function which generates a Binomial random
number
without using the rbinom function. Do I need to use the choose
function or
am I better just using a sample?
Thanks.
I think I remember other software who generates binomial data with
e.g. pi=0.7 by
pi <- 0.7
I hope Allan knows this and is just being humorous here, but for the
less experienced in the audience ... Choosing a different threshold
variable name might be less error prone. `pi` is one of few built-in
constants in R and there may be code that depends on that fact.
> pi
[1] 3.141593
> pi <- 0.7
> pi
[1] 0.7
> rm(pi)
> pi
[1] 3.141593
x <- runif(100)>pi
summary(x)
Another method would be:
x <- sample(c(0,1) , 100, replace=TRUE, prob=c(0.7, 0.3) )
--
David Winsemius, MD
West Hartford, CT
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