nlmrt: Functions for Nonlinear Least Squares Solutions
Version 2016.3.2

Replacement for nls() tools for working with nonlinear least squares problems. The calling structure is similar to, but much simpler than, that of the nls() function. Moreover, where nls() specifically does NOT deal with small or zero residual problems, nlmrt is quite happy to solve them. It also attempts to be more robust in finding solutions, thereby avoiding 'singular gradient' messages that arise in the Gauss-Newton method within nls(). The Marquardt-Nash approach in nlmrt generally works more reliably to get a solution, though this may be one of a set of possibilities, and may also be statistically unsatisfactory. Added print and summary as of August 28, 2012.

Package details

AuthorJohn C. Nash [aut, cre]
Date of publication2016-03-04 23:57:39
MaintainerJohn C. Nash <nashjc@uottawa.ca>
LicenseGPL-2
Version2016.3.2
Package repositoryView on CRAN
Installation Install the latest version of this package by entering the following in R:
install.packages("nlmrt")

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nlmrt documentation built on May 29, 2017, 2:57 p.m.