Re: All possible pair-wsie combinations

[Sundar Dorai-Raj <sundar.dorai-raj@pdf.com>]

sierra.howry wrote:
> Users:
>  
> I have
> a_seq(1:5)
> b_seq(1:5)
>  
> What is an easy method of finding the twenty five number combinations 
> and allocating to a (25,2) vector where column 1 is a values and column 
> 2 is the b values.  I need these index values to pull values from a 5X5 
> matrix.
Sierra,

See ?expand.grid

expand.grid(a=1:5, b=1:5)

regards,
sundar

P.S. the underscore as assignment has been deprecated so it's best not 
to use it anymore. See help("<-") for details.