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 )

Package stats version 6.1.5-18
Package Index