# Example

From Steve Martell's article

example.cpp — C++ source code, 641 bytes

## File contents

// Updated example from Steve Martell: Creating custom libraries for use in ADMB // ADMB Foundation Newsletter 1(4):3-4, Oct 2009 #include <admodel.h> dvariable dnorm(const double& x, const prevariable& mu, const prevariable& std) { double pi = 3.14159265358979323844; return 0.5*log(2.*pi) + log(std) + 0.5*square((x-mu)/std); } dvariable dnorm(const dvector& x, const dvar_vector& mu, const dvar_vector& std) { double pi = 3.14159265358979323844; int n = size_count(x); dvar_vector var = square(std); dvar_vector SS = square(x-mu); return 0.5*n*log(2.*pi) + sum(log(std)) + 0.5*sum(elem_div(SS,var)); }