Sorry I forgot to talk about the range. But as an example, range (17,23) works.
In your codes, mean is not exactly 20 and the samples are not integer. However, what I want is integers with mean 20 exactly. Any tips? Thanks On Thu, Sep 2, 2010 at 12:16 AM, Barry Rowlingson < [email protected]> wrote: > On Thu, Sep 2, 2010 at 7:17 AM, Yi <[email protected]> wrote: > > Hi, folks, > > > > runif (n,min,max) is the typical code for generate R.V from uniform dist. > > > > But what if we need to fix the mean as 20, and we want the values to be > > integers only? > > It's not clear what you want. Uniformly random integers with expected > mean 20 - but what range? Any range centred on 20 will work, for > example you could use sample() with replacement. To see the > distribution, use sample() > > table(sample(17:23,10000,TRUE)) > > which gives a uniform distribution of integers from 17 to 23, so the > mean is 20.0057 for 10000 samples. > > Is that what you want? > > Barry > [[alternative HTML version deleted]] ______________________________________________ [email protected] 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.
