[R] Summation in R

[Petr Pikal]

Hi

you shall probably to be more specific

tj<-rnorm(5)
vj<-matrix(25,5,5)
sum(tj*vj)
[1] 149.2977

gives you an answer but maybe not the answer you want.

HTH
Petr


On 3 Oct 2006 at 8:58, Dina Said wrote:

Date sent:      	Tue, 03 Oct 2006 08:58:15 +0200
From:           	Dina Said <dinasaid at gmail.com>
To:             	r-help at stat.math.ethz.ch
Subject:        	[R] Summation in R

> Hello!
> 
> Maybe this is a trivial question as I'm still a new baby in R but I
> wish that u will help me.
> 
> I want to calculate the following
> 
> U= sum (t_j*v_j)
> 
> where t_j is a vector
> and v_j is the matrix
> 
> Thanks
> Dina
> 
> ______________________________________________
> 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 and provide commented,
> minimal, self-contained, reproducible code.

Petr Pikal
petr.pikal at precheza.cz