Exponential decay model
Gompertz growth models
Fractional polynomial-logistic dose-response models
Acifluorfen and diquat tested on Lemna minor.
The Brain-Cousens hormesis models
Asymptotic regression model
The derivative of the Gompertz function
Extract Model Coefficients
The Brain-Cousens hormesis models
Searching through a range of initial parameter values to obtain convergence
Effect of cadmium on growth of green alga
The four-parameter log-logistic function
The four-parameter Weibull functions
Glyphosate and metsulfuron-methyl tested on algae.
Leaf length of barley
Model-robust dose-response modelling
Mortality of tobacco budworms
Creating isobolograms
Potency of two herbicides
The log-logistic function
Sets control arguments
Effect of sodium pentachlorophenate on growth of fathead minnow
Printing key features
Root length measurements
Deguelin applied to chrysanthemum aphis
Inhibition of photosynthesis
The Cedergreen-Ritz-Streibig model
Dose-response profile of degradation of agrochemical using lepidium
Log-normal dose-response model
Extracting residuals from model
The modified baro5 function
Lack-of-fit test for the mean structure based on cumulated residuals
Neill's lack-of-fit test for dose-response models
ANOVA for dose-response model fits
The Cedergreen-Ritz-Streibig model
Isobutylalcohol in nutrient solution in which lettuce plants were grown
Information on estimation
Calculating variance-covariance matrix for objects of class 'drc'
The effect of terbuthylazin on growth rate
Cedergreen-Ritz-Streibig dose-reponse model for describing hormesis
Effect of technical grade and commercially formulated auxin herbicides
Weight gain for different methionine sources
Mean function for the Gompertz dose-response or growth curve
Showing starting values used
Calculating yield loss parameters
Volume of algae as function of increasing concentrations of a herbicide
Comparison of parameters
Earthworm toxicity test
Daphnia test
Continuous data from ECVAM
Extract fitted values from model
Prediction
Weibull model functions
Example from Finney (1971)
Michaelis-Menten model
Expected or predicted response
Model selection
Estimating effective doses
Fitting dose-response models
Two-phase dose-response model
The logistic model
Effect of ferulic acid on growth of ryegrass
Bread and meat for the sandwich
Dose-response profile of degradation of agrochemical using nasturtium
Test data from a 21 day fish test
The three-parameter log-logistic function
Competition between two biotypes
The three-parameter Weibull functions
Confidence Intervals for model parameters
The two-parameter log-logistic function
Fitting multiple dose-response curves with random effects
Heart rate baroreflexes for rabbits
The five-parameter log-logistic function
Example of plant growth curve from Covarelli and Onofri (1998)
Extracting the log likelihood
Summarising non-linear model fits
Display available dose-response models
Vinclozolin from AR in vitro assay
The two-parameter Weibull functions
Maximum mean response
Mechlorprop and terbythylazine tested on Lemna minor
Plotting fitted curves for a 'drc' or 'mrdrc' object
Simulating ED values under various scenarios
Printing summary of non-linear model fits
Simulating a dose-response curve
Estimation of ED values using model-averaging
Updating and re-fitting a model
Herbicide applied to Galium aparine
Checking the model fot
Effect of erythromycin on mixed sewage microorganisms
Comparing selectivity indices across curves
Transform-both-sides Box-Cox transformation
Fitting mixture models
Mizon-Richard test for dose-response models
Effect of an effluent on the growth of mysid shrimp