[R] gsDesign

[Liaw, Andy]

Hi Dongli,

Questions about usage of specific contributed packages are best directed toward the package maintainer/author first, as they are likely the best sources of information, and they don't necessarily subscribe to or keep up with the daily deluge of R-help messages.

(In this particular case, I'm quite sure the package maintainer for gsDesign doesn't keep up with R-help.)

Best,
Andy
 

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Dongli Zhou
> Sent: Monday, November 14, 2011 6:13 PM
> To: Marc Schwartz
> Cc: r-help at r-project.org
> Subject: Re: [R] gsDesign
> 
> Hi, Marc,
> 
> Thank you very much for the reply. I'm using the gsDesign 
> function to create an object of type gsDesign. But the inputs 
> do not include the 'ratio' argument.
> 
> Dongli 
> 
> On Nov 14, 2011, at 5:50 PM, Marc Schwartz 
> <marc_schwartz at me.com> wrote:
> 
> > On Nov 14, 2011, at 4:11 PM, Dongli Zhou wrote:
> > 
> >> I'm trying to use gsDesign for a noninferiority trial with binary
> >> endpoint. Did anyone know how to specify the trial with 
> different sample
> >> sizes for two treatment groups? Thanks in advance!
> > 
> > 
> > Hi,
> > 
> > Presuming that you are using the nBinomial() function, see 
> the 'ratio' argument, which defines the desired sample size 
> ratio between the two groups.
> > 
> > See ?nBinomial and the examples there, which does include 
> one using the 'ratio' argument.
> > 
> > HTH,
> > 
> > Marc Schwartz
> > 
> 
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