drc (version 3.0-1)

searchdrc: Searching through a range of initial parameter values to obtain convergence

Description

'searchdrc' provides a facility for searching through a range of parameter values (one-dimensional) in order to obtain convergence of the estimation procedure.

Usage

searchdrc(object, which, range, len = 50)

Arguments

object
an object of class 'drc'. The object can be from a model that could not fitted.
which
a character string containing the parameter name
range
a numeric vector of length 2 specifying the interval endpoints for the range.
len
numeric. The number of points in the interval.

Value

An object of class 'drc'.

Details

The function goes through the range with increments such that in total at most len sets of parameter values are used as initial values for the estimation procedure. You would need to identify the parameter which is most likely to cause problems for the estimation procedure.

Examples

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