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double_det_minor.cpp |
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@(@\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}} }@)@This is cppad-20221105 documentation. Here is a link to its
current documentation
.
Double Speed: Determinant by Minor Expansion
Specifications
See link_det_minor
.
Implementation
# include <cppad/utility/vector.hpp>
# include <cppad/speed/det_by_minor.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_det_minor(
const std::string& job ,
size_t size ,
size_t repeat ,
CppAD::vector<double> &matrix ,
CppAD::vector<double> &det )
{ // --------------------------------------------------------------------------
// ignore global_option
// --------------------------------------------------------------------------
if( job == "setup" || job == "teardown" )
return true;
CPPAD_ASSERT_UNKNOWN( job == "run" );
//
// setup
CppAD::det_by_minor<double> Det(size);
//
// number of independent variables
size_t n = size * size;
// -------------------------------------------------------------------------
while(repeat--)
{ // get the next matrix
CppAD::uniform_01(n, matrix);
// computation of the determinant
det[0] = Det(matrix);
}
return true;
}
Input File: speed/double/det_minor.cpp