dcurver: Utility Functions for Davidian Curves
A Davidian curve defines a seminonparametric density, whose shape and flexibility can be tuned by
easy to estimate parameters. Since a special case of a Davidian curve is the standard normal density,
Davidian curves can be used for relaxing normality assumption in statistical applications (Zhang & Davidian, 2001)
<doi:10.1111/j.0006-341X.2001.00795.x>. This package provides the density function, the gradient of
the loglikelihood and a random generator for Davidian curves.
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