Many thanks for your guidance. However my original problem is, how to select n points in the Real line randomly without any preference of any particular probability distribution?
On Mon, 28 Jul 2025 at 21:45, Rui Barradas <ruipbarra...@sapo.pt> wrote: > > On 7/28/2025 5:00 PM, Daniel Lobo wrote: > > Hi, > > > > I want to draw a set of random number from Uniform distribution where > > Support is the entire Real line. > > > > runif(4, min = -Inf, max = Inf) > > > > However it produces all NAN > > > > Could you please help with the right approach? > > > > ______________________________________________ > > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide > > https://www.R-project.org/posting-guide.html > > and provide commented, minimal, self-contained, reproducible code. > Hello, > > > What you are asking doesn't make sense. > The uniform distribution's PDF is > > f(x;a, b) = 1/abs(b - a) if x in [a, b] > 0 otherwise > > So what you have is 1/abs(Inf - -Inf) = 1/abs(Inf) = 0. > > And the cumulative distribution function is even worse, it will give you > the indeterminate Inf/Inf. > See the Wikipedia on the uniform distribution [1]. > > > [1] https://en.wikipedia.org/wiki/Continuous_uniform_distribution ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide https://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
