[R] sum

[Liaw, Andy]

Won't work if the list has more than 2 matrices.

Andy

> From: Roger Peng [mailto:rpeng at stat.ucla.edu]
> 
> How about something like:
> 
> > matlist <- list(matrix(1:16, 4, 4), matrix(2, 4, 4))
> > do.call("+", matlist)
>      [,1] [,2] [,3] [,4]
> [1,]    3    7   11   15
> [2,]    4    8   12   16
> [3,]    5    9   13   17
> [4,]    6   10   14   18
> > 
> 
> -roger
> _______________________________
> UCLA Department of Statistics
> http://www.stat.ucla.edu/~rpeng
> 
> On Wed, 23 Apr 2003, Luis Silva wrote:
> 
> > Dear helpers
> > 
> > I have a list where each element is a matrix (the list is 
> > obtained with lapply). I want to sum those matrices. Is there a 
> > function to do that? The sum function sums all the elements...
> > --
> > 
> > 
> > http://adsl.sapo.pt
> > 
> > ______________________________________________
> > R-help at stat.math.ethz.ch mailing list
> > https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> >
> 
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