[R] t-criterion calculation using means and SE

[David Winsemius]

On Nov 19, 2009, at 9:40 AM, Антон Морковин wrote:

> Dear all,
>
> I need to create n*n table with sums of all possible pair  
> combinations of numbers from n-row column. What function allows it?
>

?expand.grid

> Best regards,
>
> A.Morkovin
>
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT