Well, if the dice are fair, then all rolls are independent. If you want to roll each dice 100 times, you can do something like
rolls=matrix(sample(1:6,1000,replace=T),ncol=10) apply(rolls,2,sum) I'm sure that there must be a more elegant way to do it, though. Julian On Mon, 8 Oct 2007, Zembower, Kevin wrote: > I'm trying to get R to simulate the sum of the values on 10 fair dice > (yes, it's related to a homework problem, but is not the problem > itself). I tried to do this: >> rep(sum(sample(1:6,100,replace=T)), times=10) > [1] 341 341 341 341 341 341 341 341 341 341 > > and noticed that sum(sample()) seems to be only evaluated once. How can > I overcome this, so that I get a vector of values that correspond to > independent throws of 10 dice each time? > > Thanks for your advice and suggestions. > > -Kevin > > Kevin Zembower > Internet Services Group manager > Center for Communication Programs > Bloomberg School of Public Health > Johns Hopkins University > 111 Market Place, Suite 310 > Baltimore, Maryland 21202 > 410-659-6139 > > ______________________________________________ > 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. > ______________________________________________ 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.
