Learn R Programming

⚠️There's a newer version (3.0-1) of this package.Take me there.

drc (version 1.5-5)

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.

Copy Link

Version

Install

install.packages('drc')

Monthly Downloads

28,339

Version

1.5-5

License

GPL (>= 2)

Homepage

http://www.r-project.org

Maintainer

Christian Ritz

Last Published

February 15th, 2017

Functions in drc (1.5-5)

The Cedergreen-Ritz-Streibig model

The Cedergreen-Ritz-Streibig model

Log-normal dose-response model

The Brain-Cousens hormesis models

Asymptotic regression model

Fitting dose-response models

The Cedergreen-Ritz-Streibig model

The four-parameter Weibull functions

Confidence Intervals for model parameters

Information on estimation

S.capricornutum

Effect of cadmium on growth of green alga

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

Effect of technical grade and commerecially formulated auxin herbicides

The Brain-Cousens hormesis models

Weight gain for different methionine sources

Maximum mean response

Comparison of parameters

Acifluorfen and diquat tested on Lemna minor.

Comparing selectivity indices across curves

The derivative of the Gompertz function

Gompertz growth models

Extract fitted values from model

Vinclozolin from AR in vitro assay

Mortality of tobacco budworms

The three-parameter log-logistic function

getMeanFunctions

Display available dose-response models

Sets control arguments

Test data from a 21 day fish test

Exponential decay model

Creating isobolograms

Transform-both-sides Box-Cox transformation

print.summary.drc

Printing summary of non-linear model fits

The two-parameter log-logistic function

Effect of an effluent on the growth of mysid shrimp

Michaelis-Menten model

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

Deguelin applied to chrysanthemum aphis

Effect of sodium pentachlorophenate on growth of fathead minnow

Competition between two biotypes

Collapse of levels

Comparison of effective dose values

Extracting residuals from model

The logistic (Boltzmann) model

Fitting multiple dose-response curves

Plotting raw dose response data.

Glyphosate and metsulfuron-methyl tested on algae.

Mean function for the Gompertz dose-response or growth curve

The five-parameter log-logistic function

Expected or predicted response

Extracting the log likelihood

The two-parameter Weibull functions

Bread and meat for the sandwich

Model-robust dose-response modelling

Leaf length of barley

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

The Weibull functions

Example from Finney (1971)

Heart rate baroreflexes for rabbits

The four-parameter log-logistic function

The three-parameter Weibull functions

Mechlorprop and terbythylazine tested on Lemna minor

Inhibition of photosynthesis

The modified baro5 function

The log-logistic function

Isobutylalcohol in nutrient solution in which lettuce plants were grown

Searching through a range of initial parameter values to obtain convergence

Potency of two herbicides

Model selection

Simulating a dose-response curve

Fitting multiple dose-response curves with random effects

Updating and re-fitting a model

Extract Model Coefficients

Herbicide applied to Galium aparine

Dose-response profile of degradation of agrochemical using lepidium

Estimating effective doses

Printing key features

ANOVA for non-linear model fits

Effect of ferulic acid on growth of ryegrass

Sets control arguments

Fitting mixture models

Dose-response profile of degradation of agrochemical using nasturtium

Summarising non-linear model fits

The effect of terbuthylazin on growth rate

Simulating ED values under various scenarios