Re: [R] how to generate a normal distribution with mean=1, min=0.2, max=0.8

From: Giovanni Petris <gpetris_at_uark.edu>
Date: Fri, 29 Apr 2011 09:34:35 -0500

Well, but the original poster also refers to 0.2 and 0.8 as "expected  min and max", in which case we are back to a joke...

Giovanni

On Thu, 2011-04-28 at 13:06 -0400, David Winsemius wrote:
> On Apr 28, 2011, at 12:09 PM, Ravi Varadhan wrote:
>
> > Surely you must be joking, Mr. Jianfeng.
> >
>
> Perhaps not joking and perhaps not with correct statistical
> specification.
>
> A truncated Normal could be simulated with:
>
> set.seed(567)
> x <- rnorm(n=50000, m=1, sd=1)
> xtrunc <- x[x>=0.2 & x <=0.8]
> require(logspline)
> plot(logspline(xtrunc, lbound=0.2, ubound=0.8, nknots=7))
>
> --
> David.
>
> > -------------------------------------------------------
> > Ravi Varadhan, Ph.D.
> > Assistant Professor,
> > Division of Geriatric Medicine and Gerontology School of Medicine
> > Johns Hopkins University
> >
> > Ph. (410) 502-2619
> > email: rvaradhan_at_jhmi.edu
> >
> >
> > -----Original Message-----
> > From:
> r-help-bounces_at_r-project.org [mailto:r-help-bounces_at_r-project.org
> > ] On Behalf Of Mao Jianfeng
> > Sent: Thursday, April 28, 2011 12:02 PM
> > To: r-help_at_r-project.org
> > Subject: [R] how to generate a normal distribution with mean=1,
> > min=0.2, max=0.8
> >
> > Dear all,
> >
> > This is a simple probability problem. I want to know, How to
> > generate a
> > normal distribution with mean=1, min=0.2 and max=0.8?
> >
> > I know how the generate a normal distribution of mean = 1 and sd =
> 1
> > and
> > with 500 data point.
> >
> > rnorm(n=500, m=1, sd=1)
> >
> > But, I am confusing with how to generate a normal distribution

> with
> > expected
> > min and max. I expect to hear your directions.
> >
> > Thanks in advance.
> >
> > Best,
> > Jian-Feng,
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > 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.
> >
> > ______________________________________________
> > 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
> 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.
>
>

-- 

Giovanni Petris  <GPetris_at_uark.edu>
Associate Professor
Department of Mathematical Sciences
University of Arkansas - Fayetteville, AR 72701
Ph: (479) 575-6324, 575-8630 (fax)
http://definetti.uark.edu/~gpetris/

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Received on Fri 29 Apr 2011 - 14:37:51 GMT

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