From: Henrique Dallazuanna <wwwhsd_at_gmail.com>

Date: Thu, 07 Apr 2011 15:06:06 -0300

Date: Thu, 07 Apr 2011 15:06:06 -0300

Try this:

aperm(outer(x, y, fn1, y), c(3, 1, 2))[,,2]

On Thu, Apr 7, 2011 at 3:21 PM, Bogaso Christofer
<bogaso.christofer_at_gmail.com> wrote:

> Dear all, as per my understanding, outer() function is to facilitate

*> 2-dimensional function evaluation, like to evaluate f(x,y) for different
**> values of x and y. However I have slightly modified version of that, where x
**> is a matrix with, say, 5 rows and 2 columns and y is a vector. Let take
**> following example:
**>
**>
**>
**> fn1 <- function(x1, x2, y) return (x1+x2+y)
**>
**>
**>
**> x <- matrix(1:10, nc = 2)
**>
**> y <- 1:5
**>
**>
**>
**> with this input, I want to construct a 5x5 matrix whose (1,1)th element will
**> be : fn1(x[1,1], x[1,2], y[1]), (1,2)th element will be : fn1(x[1,1],
**> x[1,2], y[2])..... (1,5)th element will be : fn1(x[1,1], x[1,2],
**> y[5]).....similarly (2,1)th element will be : fn1(x[2,1], x[2,2],
**> y[1])....etc
**>
**>
**>
**> If my 'x' object is a vector then I can easily use outer() function
**> effectively. However for my present case, I am looking for some ***outer()
**> like function*** to get the result effectively. Can somebody help me on how
**> can I do that without using any for loop?
**>
**>
**>
**> Thanks and regards,
**>
**>
**>
**>
**> [[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.
**>
*

-- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ 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 Thu 07 Apr 2011 - 18:08:55 GMT

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