\(\newcommand{\W}[1]{ \; #1 \; }\) \(\newcommand{\R}[1]{ {\rm #1} }\) \(\newcommand{\B}[1]{ {\bf #1} }\) \(\newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} }\) \(\newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} }\) \(\newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} }\) \(\newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }\)

double_poly.cpp

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Double Speed: Evaluate a Polynomial

Specifications

See link_poly .

Implementation

# include <cppad/cppad.hpp>
# include <cppad/speed/uniform_01.hpp>

// Note that CppAD uses global_option["memory"] at the main program level
# include <map>
extern std::map<std::string, bool> global_option;

bool link_poly(
    size_t                     size     ,
    size_t                     repeat   ,
    CppAD::vector<double>     &a        ,  // coefficients of polynomial
    CppAD::vector<double>     &z        ,  // polynomial argument value
    CppAD::vector<double>     &p        )  // second derivative w.r.t z
{
    if(global_option["onetape"]||global_option["atomic"]||global_option["optimize"])
        return false;
    // -----------------------------------------------------
    // setup

    // ------------------------------------------------------
    while(repeat--)
    {  // get the next argument value
        CppAD::uniform_01(1, z);

        // evaluate the polynomial at the new argument value
        p[0] = CppAD::Poly(0, a, z[0]);
    }
    return true;
}