Hi, please use the following the matrix z as the example:
x<-c(2,4,5,7,6,9,8,2,0)
y<-matrix(x,3,3)
z<-apply(y,2,function(x)x/sum(x))
z
On Tue, Mar 23, 2010 at 6:59 PM, David Winsemius <dwinsem...@comcast.net>wrote:
>
> On Mar 23, 2010, at 9:05 PM, Hongwei Dong wrote:
>
> Hi, R-helpers,
>>
>> I'm trying to use R to do a Monte Carlo simulation and need the help. What
>> I
>> have is a matrix that consists of the probabilities for the persons to
>> choose zones. For example, in the matrix shown below, each column
>> represents
>> a person, and each row represents a zone. So, the probability that the
>> first
>> person will choose the 2nd zone is 30%.
>>
>> 25% 30% 10% 30% 20% 0% 20% 50% 60% 50% 0% 10% 20% 0% 20%
>>
>
> As Alex Trebeck would say: Can you put that in the form of an R data
> object?
>
>
>
>> Based on this matrix, I want to locate the persons to zones based on the
>> probability using a Monte Carlo method. The result I want to see is like
>> this:
>>
>> 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0
>>
>> Could anyone please give some help? Thanks.
>>
>
> You cannot specify what the result _will_ be and call the process
> simulation of results at the same time. The sample function should work for
> a vector. Why not use it?
>
> --
> David.
>
>
> David Winsemius, MD
> West Hartford, CT
>
>
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
