[R] extraction of element

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 __ R-help@r-project.org mailing list

Re: [R] extraction of element

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