[R] Help plotting a histogram of X~Exp(1)

David Winsemius dwinsemius at comcast.net
Sun Mar 22 14:09:52 CET 2009

If you run this you get sensible output, but whether it meets you  
needs depends on what you meant by Exp(1):

 > Y <- rnorm(100)
 > Z <- rnorm(100)
 > X <- exp(Y+Z)
 > hist(X)

If you are looking for methods to handle random variables in R, you  
may want to look at the series of packages all beginning with "distr":
    distr, distrDoc, distrEx, distrMod, distrSim, distrTeach, distrTEst.

David Winsemius
On Mar 22, 2009, at 7:19 AM, BowlesMcCann wrote:

> I want to plot a histogram of X~Exp(1) where X is the sum of Y + Z.  
> To do
> this, should I simulate values of Y and Z using Y<-runif(100) and
> Z<-runif(100)? And where do I go from there?
> Many thanks.
> -- 
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT

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