MathCheck.cpp File Reference

#include "Math/Helpers.h"
#include "Math/ExtendedMath.h"
#include <sstream>

Functions
int	main ()

Function Documentation

main()

int main

(

)

{
    std::stringstream ss;
    for (Mdouble x=-6; x<6; x+=0.01)
    {
        Mdouble e = mathsFunc::exp(x);
        Mdouble l = mathsFunc::log(e);
        Mdouble c = mathsFunc::cos(x);
        Mdouble s = mathsFunc::sin(x);
        ss << x << " "
           << e << " "
           << l << " "
           << c << " "
           << s << "\n";
    }
    logger(INFO, "Execute 'gnuplot MathCheck.gnu' to view output");
    helpers::writeToFile("MathCheck.data", ss.str());
    helpers::writeToFile("MathCheck.gnu",
                         "set xlabel 'x'\n"
                         "p 'MathCheck.data' u 1:(log($2)) t 'log(Exp(x))',"
                         "  'MathCheck.data' u 1:3 t 'Log(Exp(x))', x,"
                         "  'MathCheck.data' u 1:5 t 'Sin(x)', sin(x),"
                         "  'MathCheck.data' u 1:4 t 'Cos(x)', cos(x)x"
                         "\n");
    //WARNING: sin and cos are really bad outside (-pi,pi)
    Mdouble d = 1e-15;
    logger(INFO, "Accuracy of sin: %\n"
                 "Accuracy of cos: %",
           mathsFunc::sin(constants::pi - d) - mathsFunc::sin(constants::pi + d), mathsFunc::cos(constants::pi) + 1);
}

References mathsFunc::cos(), mathsFunc::exp(), INFO, mathsFunc::log(), logger, constants::pi, mathsFunc::sin(), and helpers::writeToFile().