| NLSstRtAsymptote {nls} | R Documentation |
Horizontal Asymptote on the Right Side
Description
Provide an initial guess at the horizontal asymptote on
the right side (i.e. large values of x) of the graph of y
versus x from the xy object. Primarily used within
initial functions for self-starting nonlinear regression
models.
Usage
NLSstRtAsymptote(xy)
Arguments
xy |
a |
Value
A single numeric value estimating the horizontal asymptote for large x.
Author(s)
Jose Pinheiro and Douglas Bates
See Also
sortedXyData, NLSstClosestX,
NLSstRtAsymptote, selfStart
Examples
library( nls )
data( DNase )
DNase.2 <- DNase[ DNase$Run == "2", ]
DN.srt <- sortedXyData( expression(log(conc)), expression(density), DNase.2 )
NLSstRtAsymptote( DN.srt )