

   NLSstAsymptotic {nls}                        R Documentation

   FFiitt tthhee AAssyymmppttoottiicc RReeggrreessssiioonn MMooddeell

   DDeessccrriippttiioonn::

        Fits the asymptotic regression model, in the form `b0 +
              b1*exp(-exp(lrc) * x)' to the `xy' data.  This
        can be used as a building block in determining starting
        estimates for more complicated models.

   UUssaaggee::

        NLSstAsymptotic(xy, yval)

   AArrgguummeennttss::

         xy: a `sortedXyData' object

   VVaalluuee::

        A numeric value of length 3 with components labelled
        `b0', `b1', and `lrc'

   AAuutthhoorr((ss))::

        Jose Pinheiro and Douglas Bates

   SSeeee AAllssoo::

        `SSasymp'

   EExxaammpplleess::

        library( nls )
        data( Loblolly )
        Lob.329 <- Loblolly[ Loblolly$Seed == "329", ]
        NLSstAsymptotic(sortedXyData(expression(age), expression(height), Lob.329 ))

