Dose response curve helper function
This function peforms the four-parameter dose response curve fit. It is the helper function for the fit in the fit_drc_4p function.
drc_4p(data, response, dose, log_logarithmic = TRUE, pb = NULL)
data |
a data frame that contains at least the dose and response column the model should be fitted to. |
response |
the name of the column that contains the response values. |
dose |
the name of the column that contains the dose values. |
log_logarithmic |
logical indicating if a logarithmic or log-logarithmic model is fitted. If response values form a symmetric curve for non-log transformed dose values, a logarithmic model instead of a log-logarithmic model should be used. Usually biological dose response data has a log-logarithmic distribution, which is the reason this is the default. Log-logarithmic models are symmetric if dose values are log transformed. |
pb |
progress bar object. This is only necessary if the function is used in an iteration. |
An object of class drc. If no fit was performed a character vector with content "no_fit".
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