R help - May 2005 - how to get this kind of binomial distribution simulation number?

hai, I want to perform a simulation like this仯伜

Suppose that I have one population  ,it's size is 500, is composed of x,y
and z.  The probability of x, y and z is respectively is 0.3, 0.5, 0.2. I
wan to simulate a new same size population based ratio of x, y and z, how
can I get and assess  the number of x, y and z. ?

luan

Key Laboratory for Sustainable Utilization of Marine Fisheries Resources,
Ministry of Agriculture ,Yellow Sea Fisheries Research Institute, Chinese
Academy of Fishery Sciences, Qingdao 266071,China

__________________________________________________

佈伵伝仮伱佲伔佈G佊伿佅佷仯伃佒佇伖侜伒佢佉伝伨侙佄佫伬伂伝侙佊伿伡侢伾仹伻伵伋伂伌侒佊伿佅佷

luan_sheng wrote:
> 
> hai, I want to perform a simulation like this仯伜
> 
> Suppose that I have one population  ,it's size is 500, is composed of
x,y
> and z.  The probability of x, y and z is respectively is 0.3, 0.5, 0.2. I
> wan to simulate a new same size population based ratio of x, y and z, how
> can I get and assess  the number of x, y and z. ?

PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html

I guess you are looking for ?table, but your question is much too
unspecific....

Uwe Ligges


> luan
> 
> Key Laboratory for Sustainable Utilization of Marine Fisheries Resources,
> Ministry of Agriculture ,Yellow Sea Fisheries Research Institute, Chinese
> Academy of Fishery Sciences, Qingdao 266071,China
> 
> __________________________________________________
> 
> 佈伵伝仮伱佲伔佈G佊伿佅佷仯伃佒佇伖侜伒佢佉伝伨侙佄佫伬伂伝侙佊伿伡侢伾仹伻伵伋伂伌侒佊伿佅佷
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html

rmultinom(n=1,size=500,prob=c(0.3,0.5,0.2))

to get n samples each of size 500 just use the "n=" argument.

Reid Huntsinger


-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of luan_sheng
Sent: Friday, May 27, 2005 9:26 AM
To: r-help at stat.math.ethz.ch; R-help at stat.math.ethz.ch
Subject: [R] how to get this kind of binomial distribution simulation
number?




hai, I want to perform a simulation like this仯伜

Suppose that I have one population  ,it's size is 500, is composed of x,y
and z.  The probability of x, y and z is respectively is 0.3, 0.5, 0.2. I
wan to simulate a new same size population based ratio of x, y and z, how
can I get and assess  the number of x, y and z. ?

luan

Key Laboratory for Sustainable Utilization of Marine Fisheries Resources,
Ministry of Agriculture ,Yellow Sea Fisheries Research Institute, Chinese
Academy of Fishery Sciences, Qingdao 266071,China

__________________________________________________

佈伵伝仮伱佲伔佈G佊伿佅佷仯伃佒佇伖侜伒佢佉伝伨侙佄佫伬伂伝侙佊伿伡侢伾仹伻伵伋伂伌侒佊伿佅佷

______________________________________________
R-help at stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html