residuals.dr4pl

residuals.dr4pl_param

object

<p>parameters of the dr4pl object. Usually made with [dr4pl_theta]</p>

parm

dose

response

Models the relationship between dose levels and responses in a pharmacological experiment using the 4 Parameter Logistic model. Traditional packages on dose-response modelling such as 'drc' and 'nplr' often draw errors due to convergence failure especially when data have outliers or non-logistic shapes. This package provides robust estimation methods that are less affected by outliers and other initialization methods that work well for data lacking logistic shapes. We provide the bounds on the parameters of the 4PL model that prevent parameter estimates from diverging or converging to zero and base their justification in a statistical principle. These methods are used as remedies to convergence failure problems.  Gadagkar, S. R. and Call, G. B. (2015) <doi:10.1016/j.vascn.2014.08.006> Ritz, C. and Baty, F. and Streibig, J. C. and Gerhard, D. (2015) <doi:10.1371/journal.pone.0146021>.

Justin T. Landis

dr4pl

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

Alice Peng

Hyowon An

Aubrey G. Bailey

Dirk P. Dittmer

James S. Marron

residuals.dr4pl function

Compute dr4pl residuals. — residuals.dr4pl

Compute dr4pl residuals.

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residuals.dr4pl: Compute dr4pl residuals.

Description

Usage

Arguments

Value