[R] extraction of element

[Joshua Wiley]

Hi Mary,

You're really close, the issue is that you have a list, not a vector
(see the documentation for ?integrate).  So, you need to use:

1 - Beta[[1]]

or (again relying on the documentation), you could also use $ and call
it by name:

1 - Beta$value

Cheers,

Josh

On Sat, Nov 20, 2010 at 3:52 PM,  <mmstat at comcast.net> wrote:
> Hello,
>
> I want only the value of Beta so the statement  Power<-1-Beta[1] works right.
>
> How to do?  See code below
>
> Beta <- integrate(dnorm,mean=0,sd=1, 2.3552,Inf)
> Power<- 1-Beta[1]
>
> Sincerely,
> Mary A. Marion
>
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>



-- 
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/