get_drm: Function to generate a dose-response model from a data frame.
Description
Function to generate a dose-response model from a data frame.
Usage
get_drm(x, form = NULL, model = c("LL.3", "LL.4", "W1.4", "W2.4"), idcol = "ID")
Arguments
x
a data frame that has at least the columns listed in the form
argument (e.g. "response" and "dose", see examples).
form
a formula specifying the column names for the response and dose.
Defaults to NULL.
model
one of 4 options:
- LL.3 = Log Logistic 3 parameter with a lower limit of 0.
- LL.4 = Log Logistic 4 parameter with lower limit estimated.
- W1.4 = Weibul 4 parameter type 1.
- W2.4 = Weibul 4 parameter type 2.
idcol
the name of the column that identifies the samples (case sensitive).
Details
A wrapper function for drm, this will attempt to
catch errors generated due to non-finite responses. When these are
encounterd, a message that the model was not evaluated will be printed to
the screen and NA will be returned.