[R] sum of list elements
Patrick Burns
pburns at pburns.seanet.com
Fri Jul 3 10:50:26 CEST 2009
My guess is that the original
poster is expecting a matrix
not a scalar. If so, then:
> Reduce('+', a)
[,1] [,2] [,3]
[1,] 3 0 0
[2,] 0 3 0
[3,] 0 0 3
Patrick Burns
patrick at burns-stat.com
+44 (0)20 8525 0696
http://www.burns-stat.com
(home of "The R Inferno" and "A Guide for the Unwilling S User")
David Winsemius wrote:
>
> On Jul 2, 2009, at 11:24 PM, David Winsemius wrote:
>
>>
>> On Jul 2, 2009, at 10:20 PM, Ivo Shterev wrote:
>>
>>> a = list(diag(3), diag(3), diag(3))
>>
>>
>>
>> a = list(diag(3), diag(3), diag(3))
>> > sum(unlist(a))
>> [1] 9
>
>> Also:
> > sum(sapply(a,I))
> [1] 9
>
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
>
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