R help - Aug 2005 - Defining an ex-gaussian PDF

How does one define PDFs as yet undefined in R, such as the ex- 
gaussian, the sum of two RVs, one exponential, one Gaussian? The PDF  
would then be the convolution of an exponential PDF, dexp(), and a  
normal, dnorm().

Kindly cc me in your reply to r-help.

Thanks,


_____________________________
Professor Michael Kubovy
University of Virginia
Department of Psychology
USPS:     P.O.Box 400400    Charlottesville, VA 22904-4400
Parcels:    Room 102        Gilmer Hall
         McCormick Road    Charlottesville, VA 22903
Office:    B011    +1-434-982-4729
Lab:        B019    +1-434-982-4751
Fax:        +1-434-982-4766
WWW:    http://www.people.virginia.edu/~mk9y/



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1.  I just got 10 hits from 'RSiteSearch("convolution of exponential 
and normal")', at least two of which look like they might interest you.

	  2.  I similarly got 27 hits from 'RSiteSearch("convolution 
distribution")', several of which mention the "distr"
package, which you
might find useful.

	  3.  I doubt if this solves your problem, but I hope you find it 
useful.  If you have other questions for this list, I encourage you to 
PLEASE do read the posting guide! 
"http://www.R-project.org/posting-guide.html".  It can increase the 
chances that you will get a useful reply quickly.

	  spencer graves

Michael Kubovy wrote:
> How does one define PDFs as yet undefined in R, such as the ex- 
> gaussian, the sum of two RVs, one exponential, one Gaussian? The PDF  
> would then be the convolution of an exponential PDF, dexp(), and a  
> normal, dnorm().
> 
> Kindly cc me in your reply to r-help.
> 
> Thanks,
> 
> 
> _____________________________
> Professor Michael Kubovy
> University of Virginia
> Department of Psychology
> USPS:     P.O.Box 400400    Charlottesville, VA 22904-4400
> Parcels:    Room 102        Gilmer Hall
>          McCormick Road    Charlottesville, VA 22903
> Office:    B011    +1-434-982-4729
> Lab:        B019    +1-434-982-4751
> Fax:        +1-434-982-4766
> WWW:    http://www.people.virginia.edu/~mk9y/
> 
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
-- 
Spencer Graves, PhD
Senior Development Engineer
PDF Solutions, Inc.
333 West San Carlos Street Suite 700
San Jose, CA 95110, USA

spencer.graves at pdf.com
www.pdf.com <http://www.pdf.com>
Tel:  408-938-4420
Fax: 408-280-7915

@BOOK{Mandel1995,
   title = {Analysis of two-way layouts},
   publisher = {Chapman \& Hall},
   year = {1995},
   address = {New York, NY, USA},
   author = {John Mandel},
}

describes diagnostics for identifying concurrent structures (i.e., y_ 
{ij} = A + B_{i} * C_{j} + e_{ij} ). Does anyone know of an  
implementation in R?


_____________________________
Professor Michael Kubovy
University of Virginia
Department of Psychology
USPS:     P.O.Box 400400    Charlottesville, VA 22904-4400
Parcels:    Room 102        Gilmer Hall
         McCormick Road    Charlottesville, VA 22903
Office:    B011    +1-434-982-4729
Lab:        B019    +1-434-982-4751
Fax:        +1-434-982-4766
WWW:    http://www.people.virginia.edu/~mk9y/