From: Vincent Goulet <vincent.goulet_at_act.ulaval.ca>

Date: Wed, 23 Apr 2008 09:56:29 -0400

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. Received on Wed 23 Apr 2008 - 14:16:18 GMT

Date: Wed, 23 Apr 2008 09:56:29 -0400

Le mer. 23 avr. à 06:59, William Simpson a écrit :

> Thanks Phipp very much for your help. I had meant, given that I'd

*> computed the matrix f[x,y] and the vector e[x], how to take the
**> difference. What is confusing is how to subtract a vector from a
**> matrix. I don't want the recycling rule.
*

Well, then, how do you define the difference between a matrix and a vector if the vector is not recycled into a matrix?

Thanks to the column major order S uses and recycling, the difference between an m x n matrix 'M' and a vector of length n 'v',

M - v,

yields the "right thing", namely the difference between each column of M and v.

HTH Vincent

*>
**>
*

> Cheers

*> Bill
**>
**> On Tue, Apr 22, 2008 at 9:53 AM, Philipp Pagel <p.pagel_at_wzw.tum.de>
**> wrote:
**>>
**>>> g(x,y) = f(x,y) - e(x)- e(y)
**>>> These are continuous functions. I am not sure how to do this with
**>>> the
**>>> discrete equivalents in R.
**>>
**>> Is this what you are looking for?
**>>
**>> g <- function(x, y) {
**>>
**>> f(x,y) - e(x) - e(y)
**>> }
**>>
**>> cu
**>> Philipp
**>>
**>> --
**>> Dr. Philipp Pagel
**>> Lehrstuhl für Genomorientierte Bioinformatik
**>> Technische Universität München
**>> Wissenschaftszentrum Weihenstephan
**>> 85350 Freising, Germany
**>> http://mips.gsf.de/staff/pagel
**>>
**>> ______________________________________________
**>> 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.
*

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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. Received on Wed 23 Apr 2008 - 14:16:18 GMT

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