[R] R 0.64.2 indexing

[Thomas Lumley]

On Wed, 18 Aug 1999, Thomas Lumley wrote:

> On Thu, 19 Aug 1999, Peppy wrote:
> 
> > Hi,
> > 
> > > Say we have a large-sized vector of observation A and a time vector with
> > > the same size.  The latter vector basically is the time flag when ith
> > > obervation of A occurs, hence A[i] occurs at T[i].
> > > 

> 
> T[A ==max(A, na.rm=TRUE) & !is.na(A)]
>  does what you want

Perhaps a tidier solution is 

  T[which(A==max(A,na.rm=TRUE))]



Thomas Lumley
Assistant Professor, Biostatistics
University of Washington, Seattle

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