FindInitialParms: FindInitialParms

In dr4pl: Dose Response Data Analysis using the 4 Parameter Logistic (4pl) Model

Description

Find initial parameter estimates for a 4PL model.

Usage

FindInitialParms(
  x,
  y,
  trend = "auto",
  method.init = "Mead",
  method.robust = "squared"
)

Arguments

x	Vector of dose levels
y	Vector of responses
trend	Indicator of whether the curve is a decreasing θ[3]<0 or increasing curve θ[3]>0. See dr4pl for detailed explanation.
method.init	Method of obtaining initial values of the parameters. See dr4pl for detailed explanation.
method.robust	Parameter to select loss function for the robust estimation method to be used to fit a model. See dr4pl for detailed explanation.

Value

Initial parameter estimates of a 4PL model in the order of the upper asymptote, IC50, Slope and lower asymptote parameters.

dr4pl documentation built on Aug. 17, 2021, 5:06 p.m.