[R] logic operation on an array

[Charles C. Berry]

an array is just a vector with attributes.

> all ( diag(2) == 0 )
[1] FALSE
> all ( diag(2)*0 == 0 )
[1] TRUE
>

On Tue, 28 Aug 2007, Gang Chen wrote:

> I want to check whether all the components of a vector (or an array)
> are 0, and if they are I will skip the later computations. Of course
> I can create a loop to go through all the components. However is
> there an R function for this purpose more efficient than looping?
>
> Thanks a lot,
> Gang
>
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Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901