### Numerical Partial Derivative Estimation – the {NNS} package

NNS (v0.5.5) now on CRAN has an updated partial derivative routine dy.d_() . This function estimates true average partial derivatives, as well as ceteris paribus conditions for points of interest. Example below on the syntax for estimating first derivatives of the function y = x_1^2 * x_2^2 , for the points x_1 = 0.5 and … ... [Read more...]