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# drfit
[](https://cran.r-project.org/package=drfit)
A somewhat outdated package of basic and easy-to-use functions for
fitting dose-response curves to continuous dose-response data, calculating some
toxicological parameters and plotting the results. Please consider using
the more powerful and actively developed 'drc' package.
Functions that are fitted are the cumulative density function of the log-normal
distribution ('probit' fit), of the logistic distribution ('logit' fit), of the
Weibull distribution ('weibull' fit) and a linear-logistic model ('linlogit'
fit), derived from the latter, which is used to describe data showing
stimulation at low doses (hormesis). In addition, functions checking, plotting
and retrieving dose-response data retrieved from a database accessed via 'odbc'
are included. As an alternative to the original fitting methods, the algorithms
from the 'drc' package can be used.
More details can be found in the [function reference](https://pkgdown.jrwb.de/drfit/reference/index.html).
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