K 10 svn:author V 4 tota K 8 svn:date V 27 2016-10-10T12:49:50.168154Z K 7 svn:log V 571 - Add new port: math/R-cran-numDeriv Methods for calculating (usually) accurate numerical first and second order derivatives. Accurate calculations are done using 'Richardson"s' extrapolation or, when applicable, a complex step derivative is available. A simple difference method is also provided. Simple difference is (usually) less accurate but is much quicker than 'Richardson"s' extrapolation and provides a useful cross-check. Methods are provided for real scalar and vector valued functions. WWW: https://cran.r-project.org/web/packages/numDeriv/ END