Dear R members, I have a quite large of function that are named like that f11,f12,...f15 f21,f22,...f25 .. f51,f52,...f52 These are static (hard-coded) functions that the only common they have is that they take the same number and type of input fij(a,b,c,d). As you might understand this is really close to the notion of matrix only that my 'matrix' contains functions. It would be great if I can address all these function using a numbering-scheme like F(i,j) where for example F(1,1) will return the f11(a,b,c,d,). I am sure that this might be quite complex to implement so could you please refer me to some book/tutorial that addresses this kind of topics? I would like to thank you in advance for your help Best Regards Alex
Seems funny to me:
> f <- list (mean, sd, median, sum)
> dim (f) <- c (2, 2)
or in one line:
> f <- structure (.Data=list (mean, sd, median, sum), dim = c(2,2))
> f
[,1] [,2]
[1,] ? ?
[2,] ? ?
> f [1,1]
[[1]]
function (x, ...)
UseMethod("mean")
<environment: namespace:base>
> f [[1,1]] (1:3)
[1] 2
> f [[2,1]] (1:3)
[1] 1
> f [[1,2]] (1:3)
[1] 2
> f [[2,2]] (1:3)
[1] 6
HTH
Claudia
On 02/03/2011 05:33 PM, Alaios wrote:> Dear R members,
> I have a quite large of function that are named like that
> f11,f12,...f15
> f21,f22,...f25
> ..
> f51,f52,...f52
>
> These are static (hard-coded) functions that the only common they have is
that they take the same number and type of input fij(a,b,c,d). As you might
understand this is really close to the notion of matrix only that my
'matrix' contains functions. It would be great if I can address all
these function using a numbering-scheme like F(i,j) where for example
> F(1,1) will return the f11(a,b,c,d,).
>
> I am sure that this might be quite complex to implement so could you please
refer me to some book/tutorial that addresses this kind of topics?
>
> I would like to thank you in advance for your help
> Best Regards
> Alex
>
> ______________________________________________
> 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.
--
Claudia Beleites
Dipartimento dei Materiali e delle Risorse Naturali
Universit? degli Studi di Trieste
Via Alfonso Valerio 6/a
I-34127 Trieste
phone: +39 0 40 5 58-37 68
email: cbeleites at units.it
Hello,
Here is a quick suggestion:
F<-function(i,j,a,b,c,d)
{
res<-eval(parse(text=paste("f",i,j,"(a,b,c,d),sep="")))
return(res)
}
HTH,
Samuel
-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Alaios
Sent: 03 February 2011 16:33
To: R-help at r-project.org
Subject: [R] "Matrix' with Functions
Dear R members,
I have a quite large of function that are named like that
f11,f12,...f15
f21,f22,...f25
..
f51,f52,...f52
These are static (hard-coded) functions that the only common they have is that
they take the same number and type of input fij(a,b,c,d). As you might
understand this is really close to the notion of matrix only that my
'matrix' contains functions. It would be great if I can address all
these function using a numbering-scheme like F(i,j) where for example
F(1,1) will return the f11(a,b,c,d,).
I am sure that this might be quite complex to implement so could you please
refer me to some book/tutorial that addresses this kind of topics?
I would like to thank you in advance for your help
Best Regards
Alex
______________________________________________
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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