[R] Sampe numbers

[Daniel Nordlund]

Frederic,

you need to be more clear about what you want to do.  If you are 
sampling 100 numbers from 1:100 with replacement, the sum will always be 
greater than 50 (as has already been pointed out).

In addition, you mention trying to eliminate zeros.  If you are sampling 
from 1:100 there will be no zeros.  So what are you really trying to do?


Dan

Dan Nordlund
Port Townsend, WA  USA


On 7/19/2016 11:54 AM, Frederic Ntirenganya wrote:
> The problem is that there
> are some zeros  while the numbers should range from 1 to  100
>
> As the replace= TRUE if the smallest candidate is 1 may be replaced
> because if I can have 1, fifty times this is equal to 50.
> Remember that it is a sampling with a replacement
>
> I am still wondering how I can remove the zero value.
>
>
> Frederic Ntirenganya
> Maseno University,
> African Maths Initiative,
> Kenya.
> Mobile:(+254)718492836
> Email: fredo at aims.ac.za
> https://sites.google.com/a/aims.ac.za/fredo/
>
> On Tue, Jul 19, 2016 at 9:11 PM, <JLucke at ria.buffalo.edu> wrote:
>
>> N <- 100
>> C <- 50
>> x <- numeric(N)
>> for (i in 1:N){
>>   x[i] <- sample(C-sum(x),1)
>> }
>> x
>> sum(x)
>>
>>
>>
>>
>> *Frederic Ntirenganya <ntfredo at gmail.com <ntfredo at gmail.com>>*
>> Sent by: "R-help" <r-help-bounces at r-project.org>
>>
>> 07/19/2016 01:41 PM
>> To
>> "r-help at r-project.org" <r-help at r-project.org>,
>>
>> cc
>> Subject
>> [R] Sampe numbers
>>
>>
>>
>>
>> Hi Guys,
>> I am trying to sample 100 numbers from 1:100
>> i did it  like this:
>>
>> sample(1:100,100, replace= TRUE)
>> but i want again include a constraint that their sum must be equal to 50
>>
>> How could I do it?
>>
>> Cheers
>>
>> Frederic Ntirenganya
>> Maseno University,
>> African Maths Initiative,
>> Kenya.
>> Mobile:(+254)718492836
>> Email: fredo at aims.ac.za
>> https://sites.google.com/a/aims.ac.za/fredo/
>>
>>
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>>
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>>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
>


-- 
Daniel Noredlund
Bothell, WA USA