[R] g(x,y) = f(x,y) - e(x)- e(y)?

[Vincent Goulet]

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.