fitprobit: Fit a Probit Regression to Dose-Effect Data
In LW1949: An Automated Approach to Evaluating Dose-Effect Experiments Following Litchfield and Wilcoxon (1949)
Description
Usage
Arguments
Details
Value
Examples
Description
Fit a probit regression to dose-effect data, using the log10 of the dose as
the response.
Usage
1
fitprobit(dat)
Arguments
dat
A data frame of toxicity data, including at least three variables:
dose (the concentration of the tested chemical),
ntot (the number of individuals tested), and
nfx (the number of affected individuals).
Details
Only those rows with dose > 0, ntot > 0, and nfx >= 0
are used in fitting the model.
Value
A an object of class glm.
Examples
1
2
3
4
5
toxdat <- data.frame(
dose=c(0.05, 0.0625, 0.125, 0.25, 0.5, 1),
ntot=rep(8, 6),
nfx = c(0, 1, 4, 4, 6, 8))
fitprobit(toxdat)
LW1949 documentation built on May 2, 2019, 6:11 a.m.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Description Usage Arguments Details Value Examples
Description
Fit a probit regression to dose-effect data, using the log10 of the dose as the response.
Usage
1 | fitprobit(dat)
|
Arguments
dat |
A data frame of toxicity data, including at least three variables: dose (the concentration of the tested chemical), ntot (the number of individuals tested), and nfx (the number of affected individuals). |
Details
Only those rows with dose > 0, ntot > 0, and nfx >= 0
are used in fitting the model.
Value
A an object of class glm.
Examples
1 2 3 4 5 | toxdat <- data.frame(
dose=c(0.05, 0.0625, 0.125, 0.25, 0.5, 1),
ntot=rep(8, 6),
nfx = c(0, 1, 4, 4, 6, 8))
fitprobit(toxdat)
|
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Embedding an R snippet on your website
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.