Description Usage Arguments Details Value Note Author(s) See Also Examples
'W1.2' is the two-parameter Weibull function where the lower limit is fixed at 0 and the upper limit is fixed at 1, mostly suitable for binomial/quantal responses.
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upper |
numeric value. The fixed, upper limit in the model. Default is 1. |
fixed |
numeric vector. Specifies which parameters are fixed and at what value they are fixed. NAs for parameter that are not fixed. |
names |
a vector of character strings giving the names of the parameters. The default is reasonable. |
... |
additional arguments to be passed from the convenience functions. |
The two-parameter Weibull model is given by the expression
f(x) = \exp(-\exp(b(\log(x)-e))).
The function is asymmetric about the inflection point, that is the parameter \exp(e).
See weibull1
.
This function is for use with the function drm
.
Christian Ritz
Related functions are W1.3
, W1.4
, weibull1
and weibull2
.
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