Hi Randall,

Try also

sum( x==1 )

HTH,
Jorge


On Fri, Feb 26, 2010 at 9:40 AM, Randall Wrong <> wrote:

> Dear R users,
>
> I want to count the number of ones in a vector x.
>
> That's what I did : length( x[x==1] )
>
> Is that a good solution ?
> Thank you very much,
> Randall
>
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