R 0.64.2 indexing

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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