[R] How to calculate the product of every two elements in two lists?

[Joshua Wiley]

Hi,

Do you mean something like this?

mapply(`*`, zz, tt)
     [,1] [,2] [,3]
[1,]    1    1    1
[2,]    0    1    1
[3,]    0    0    1

or do you want each element of zz by each element of tt (i.e., every
possible 2-way combination)?

Cheers,

Josh

On Mon, Jun 13, 2011 at 6:23 AM, carla moreira <carlamgmm at gmail.com> wrote:
>
> u<-c(0.1,0.2,0.3)
> v<-c(0.2,0.3,0.5)
>
> outer1<-outer(u,u,">=")
> outer2<-outer(v,v,">=")
> m<-nrow(outer1)
> j<-nrow(outer2)
> zz<-lapply(1:m, function(m) as.numeric(outer1[m,]))
> tt<-lapply(1:m, function(m) as.numeric(outer2[m,]))
>
> zz[[1]]*tt[[3]], e.g., is possible, but I want every products between two
> lists.
>
> Is there a way to do that?
>
> --
> View this message in context: http://r.789695.n4.nabble.com/How-to-calculate-the-product-of-every-two-elements-in-two-lists-tp3593832p3593832.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> 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.
>



-- 
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/