linlogitf

In this context, the x variable is the dose.

In the drfit functions, k is set to 1.

One of the parameters describing the curve shape.

The parameter describing the location of the curve (log ED50).

Helper function describing a special type of dose-response curves, showing a stimulus
 at subtoxic doses.

models

regression

nonlinear

A somewhat outdated package of basic and easy-to-use functions for
fitting dose-response curves to continuous dose-response data, calculating some
toxicological parameters and plotting the results. Please consider using
the more powerful and actively developed 'drc' package.  Functions that are
fitted are the cumulative density function of the log-normal distribution
('probit' fit), of the logistic distribution ('logit' fit), of the Weibull
distribution ('weibull' fit) and a linear-logistic model ('linlogit' fit),
derived from the latter, which is used to describe data showing stimulation at
low doses (hormesis). In addition, functions checking, plotting and retrieving
dose-response data retrieved from a database accessed via 'odbc' are included.
As an alternative to the original fitting methods, the algorithms from the 'drc'
package can be used.

linlogitf: Linear-logistic function

Description

Usage

Arguments

Value

References