Interesting set of question.. I am completely new to R but let me try my
luck.
Random number in R
x <- runif(60 , 0 , 10) # 60 numbers from 0 to 10
y<- runif(60, 15 , 25) # same as above , from 15 to 25
The second part though. Do you mean ,
for( i in 1:length(x)) {
z = x[i] + y[i]
return z
}
something like that? No idea about the third part though.
regards
Billy
On Sun, Apr 29, 2012 at 9:29 AM, Mike Miller <mbmille...@gmail.com> wrote:
> On Fri, 27 Apr 2012, Vale Fara wrote:
>
> I am working with lotteries and I need to generate two sets of uniform
>> random numbers.
>>
>> Requirements:
>> 1) each set has 60 random numbers
>>
>
> random integers?
>
>
> 2) random numbers in the first set are taken from an interval (0-10),
>> whereas numbers in the second set are taken from a higher interval
>> (15-25)
>>
>
> Depends on if you mean integers. R has functions. Here's one:
>
> http://www.astrostatistics.**psu.edu/su07/R/html/stats/**html/Uniform.html<http://www.astrostatistics.psu.edu/su07/R/html/stats/html/Uniform.html>
>
>
>
> 3) numbers generated in the first set should be matched to numbers in
>> the second set (row by row) so that the expected value of each couple
>> of random numbers (i.e. of each lottery) is around to a given value
>> (12.5 +/- 5, where 12.5 is the median value of the interval extremes).
>>
>
> Do you mean that the mean for the pair of numbers must be between 7.5 and
> 17.5, inclusive? That means the sum must be from 15 to 35. Well, you are
> in luck because if you make the numbers as you suggested above, that will
> happen -- you don't have to do anything special to make it happen.
>
>
>
> For the computation of the expected value, the probabilities in each
>> lottery are ½ and ½.
>>
>
> For what outcome? You lost me.
>
>
>
> How do this? Any help given would be greatly appreciated.
>>
>
> I hope that helps.
>
> Mike
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