Linear-logistic function

Helper function describing a special type of dose-response curves, showing a stimulus at subtoxic doses.

linlogitf(x,k,f,mu,b)

Arguments

x

In this context, the x variable is the dose.

k

In the drfit functions, k is set to 1.

f

One of the parameters describing the curve shape.

mu

The parameter describing the location of the curve (log ED50).

b

One of the parameters describing the curve shape.

Value

The response at dose x.

References

van Ewijk, P. H. and Hoekstra, J. A. (1993) Ecotox Environ Safety 25 25-32

Author

Johannes Ranke jranke@uni-bremen.de