3 messages · BowlesMcCann, David Winsemius
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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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. > -- > View this message in context: http://www.nabble.com/Help-plotting-a-histogram-of-X%7EExp%281%29-tp22645091p22645091.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at 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. David Winsemius, MD Heritage Laboratories West Hartford, CT
Thank you very much! :)
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. -- View this message in context: http://www.nabble.com/Help-plotting-a-histogram-of-X%7EExp%281%29-tp22645091p22645091.html Sent from the R help mailing list archive at Nabble.com.
______________________________________________ R-help at 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.
David Winsemius, MD Heritage Laboratories West Hartford, CT
______________________________________________ R-help at 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.
:clap::clap::clap:
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