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drc (version 1.0-3)

Analysis of dose-response curves

Description

Non-linear regression analysis for 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

1.0-3

License

GNU GPL (version 2 or any later version)

Maintainer

Christian Ritz

Last Published

February 15th, 2017

Functions in drc (1.0-3)

glymet

Glyphosate and metsulfuron-methyl tested on algae.
mlogistic

The modified logistic function
SI

Comparing selectivity indices across curves
RScompetition

Competition between two biotypes
bcl4

The four-parameter logistic function with Brain-Cousens' modification
finney71

Example from Finney (1971)
MM

Michaelis-Menten model
cabanne

data name/kind
mixdrc

Fitting multiple dose-response curves with random effects
boltzmann

Boltzmann model
l4

The four-parameter logistic function
logLik.drc

Extracting the log likelihood
termec

Mechlorprop and terbythylazine tested on Lemna minor
mdControl

Sets control arguments
onecurve

Root length
compParm

Comparison of parameters
daphnids

Daphnia test
MAX

Maximum mean response
print.drc

Printing key features
bcl3

The three-parameter logistic function with Brain-Cousens' modification
FA

Effect of Ferulic Acid on growth of ryegrass
diagnostics

Display information on estimation procedure
hormesis

Hormesis data set
ml4a

The modified logistic function
heartrate

Heart rate baroreflexes for rabbits
leaflength

Leaf length of barley
plotraw

Plotting raw dose response data.
w4

The four-parameter Weibull function
residuals.drc

Extracting residuals from model
multdrc

Fitting multiple dose-response curves
logistic

The logistic function
ml3a

The modified logistic function
twofactors

Dose-response curves for multiple factors
w2

The two-parameter Weibull function
drc-package

Modelling dose-response curves
PestSci

Inhibition of photosynthesis
ml4c

The modified logistic function
ml3b

The modified logistic function
acidiq

Acifluorfen and diquat tested on Lemna minor.
weibull

The Weibull function
predict.drc

Prediction
christensenetal2003

Potency of two herbicides
earthworms

Earthworms
l5

The five-parameter logistic function
plot.drc

Plotting fitted curves for a drc object
l3

The three-parameter logistic function
mselect

Model selection
summary.drc

Summarising non-linear model fits
confint.drc

Confidence Intervals for model parameters
coef.drc

Extract Model Coefficients
update.drc

Updating and re-fitting a model
l2

The two-parameter logistic function
w3

The three-parameter Weibull function
vcov.drc

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

A suite of bioassays
mixture

Fitting mixture models
colFct

Collapse of levels
isomerization

Reaction rate of the catalytic isomerization
braincousens

The Brain-Cousens modification of the logistic function
ED

Estimating effective dosage
TerMet

The effect of terbuthylazin on growth rate
fitted.drc

Extract fitted values from model
isobole

Creating isobolograms
baro5

The modified baro5 function
ml3c

The modified logistic function
ml4b

The modified logistic function
richards

Richards model
anova.drc

ANOVA for non-linear model fits
searchdrc

Searching through a range of initial parameter values to obtain convergence
print.summary.drc

Printing summary of non-linear model fits