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drc (version 1.5-2)

Analysis of dose-response curves

Description

Analysis of one or multiple curves with focus on concentration-response, dose-response and time-response curves used, for example in biology, environmental sciences, medicine, pharmacology, toxicology.

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Version

Install

install.packages('drc')

Monthly Downloads

28,339

Version

1.5-2

License

GPL (>= 2)

Homepage

http://www.r-project.org

Maintainer

Christian Ritz

Last Published

February 15th, 2017

Functions in drc (1.5-2)

Michaelis-Menten model

Heart rate baroreflexes for rabbits

Leaf length of barley

The log-logistic function

The four-parameter Weibull functions

Potency of two herbicides

The Brain-Cousens hormesis models

Maximum mean response

The three-parameter Weibull functions

Plotting fitted curves for a 'drc' or 'mrdrc' object

The four-parameter log-logistic function

Acifluorfen and diquat tested on Lemna minor.

Confidence Intervals for model parameters

Asymptotic regression model

Fitting multiple dose-response curves with random effects

Bread and meat for the sandwich

Extract fitted values from model

The two-parameter Weibull functions

The five-parameter log-logistic function

Competition between two biotypes

Isobutylalcohol in nutrient solution in which lettuce plants were grown

Herbicide applied to Galium aparine

Dose-response profile of degradation of agrochemical using lepidium

Fitting dose-response models

Weight gain for different methionine sources

ANOVA for non-linear model fits

Collapse of levels

Exponential decay model

Example of plant growth curve from Covarelli and Onofri (1998)

Extract Model Coefficients

Deguelin applied to chrysanthemum aphis

Estimating effective doses

Sets control arguments

Fitting multiple dose-response curves

The Brain-Cousens hormesis models

Test data from a 21 day fish test

Mechlorprop and terbythylazine tested on Lemna minor

Example from Finney (1971)

Creating isobolograms

Fitting mixture models

Comparison of parameters

Expected or predicted response

Glyphosate and metsulfuron-methyl tested on algae.

Extracting the log likelihood

The derivative of the Gompertz function

Comparing selectivity indices across curves

Information on estimation

getMeanFunctions

Display available dose-response models

The Cedergreen-Ritz-Streibig model

Gompertz growth models

The Cedergreen-Ritz-Streibig model

The three-parameter log-logistic function

Effect of technical grade and commerecially formulated auxin herbicides

Transform-both-sides Box-Cox transformation

The Cedergreen-Ritz-Streibig model

The modified baro5 function

Sets control arguments

Comparison of effective dose values

The logistic (Boltzmann) model

print.summary.drc

Printing summary of non-linear model fits

Vinclozolin from AR in vitro assay

Printing key features

The Weibull functions

Simulating a dose-response curve

Updating and re-fitting a model

Inhibition of photosynthesis

Model-robust dose-response modelling

The two-parameter log-logistic function

Extracting residuals from model

Simulating ED values under various scenarios

Model selection

Effect of ferulic acid on growth of ryegrass

Summarising non-linear model fits

The effect of terbuthylazin on growth rate

Dose-response profile of degradation of agrochemical using nasturtium

Searching through a range of initial parameter values to obtain convergence

Plotting raw dose response data.

Calculating Variance-Covariance Matrix for objects of class 'drc'