NLSstLfAsymptote
Horizontal Asymptote on the Left Side
Description
Provides an initial guess at the horizontal asymptote on the left side
(that is, the small 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
# Generic function
NLSstLfAsymptote(xy)
## S3 method for class 'sortedXyData':
NLSstLfAsymptote(xy)
Arguments
| xy |
a sortedXyData object.
|
Value
returns a single numeric value estimating the horizontal asymptote for small
x.
Note
NLSstLfAsymptote() is generic and has only one non-visible method for class "sortedXyData".
See Also
sortedXyData
Examples
DNase.2 <- Sdatasets::DNase[ Sdatasets::DNase$Run == "2", ]
DN.srt <- sortedXyData( expression(log(conc)), expression(density), DNase.2 )
NLSstLfAsymptote( DN.srt )