backfit {drc} | R Documentation |
Calculation of backfit values from a fitted dose-response model
Description
By inverse regression backfitted dose values are calculated for the mean response per dose.
Usage
backfit(drcObject)
Arguments
drcObject |
an object of class 'drc'. |
Value
Two columns with the original dose values and the corresponding backfitted values using the fitted dose-response model. For extreme dose values (e.g., high dose ) the backfitted values may not be well-defined (see the example below).
Author(s)
Christian Ritz after a suggestion from Keld Sorensen.
References
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See Also
A related function is ED.drc
.
Examples
ryegrass.LL.4 <- drm(rootl~conc, data=ryegrass, fct=LL.4())
backfit(ryegrass.LL.4)
[Package drc version 3.0-1 Index]