extract parameter uncertainties from profiles
# S3 method for parframe
confint(object, parm = NULL, level = 0.95, ...,
val.column = "data")object of class parframe, returned from profile function.
a specification of which parameters are to be given confidence intervals, either a vector of numbers or a vector of names. If missing, all parameters are considered.
the confidence level required.
not used right now.
the value column used in the parframe, usually 'data'.