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sparse_evaluate: Example and test
 
# include <cppad/speed/sparse_evaluate.hpp>
# include <cppad/speed/uniform_01.hpp>
# include <cppad/cppad.hpp>

bool sparse_evaluate(void)
{	using CppAD::NearEqual;
	using CppAD::AD;

	bool ok = true;

	size_t n   = 3;
	size_t ell = 5;
	CppAD::vector<size_t>     i(ell);
	CppAD::vector<size_t>     j(ell);
	CppAD::vector<double>       x(n);
	CppAD::vector<double>       ym(n);
	CppAD::vector< AD<double> > X(n);
	CppAD::vector< AD<double> > Ym(1);

	// choose x
	size_t k;
	for(k = 0; k < n; k++)
	{	x[k] = double(k + 1);
		X[k] = x[k];
	}

	// choose i, j
	for(k = 0; k < ell; k++)
	{	i[k] = k % n;
		j[k] = (ell - k) % n;
	}

	// declare independent variables
	Independent(X);

	// evaluate function
	size_t m = 0;
	CppAD::sparse_evaluate(X, i, j, m, Ym);

	// evaluate derivative
	m = 1;
	CppAD::sparse_evaluate(x, i, j, m, ym);

	// use AD to evaluate derivative
	CppAD::ADFun<double>   F(X, Ym);
	CppAD::vector<double>     dy(n);
	dy = F.Jacobian(x);

	for(k = 0; k < n; k++)
		ok &= NearEqual(ym[k], dy[k] , 1e-10, 1e-10);
 
	return ok;
}

Input File: speed/example/sparse_evaluate.cpp