fn_dpolyval.hpp File Reference

Evaluates the first derivative of a polynomial. More...

#include "typedefs.hpp"
#include "cl_Vector.hpp"

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Namespaces
namespace	belfem
	USER GUIDES:

Functions
template<typename T>
T	belfem::dpolyval (const Vector< T > &aCoeffs, const T aX)
	Evaluates the first derivative of a polynomial at one point.

Detailed Description

Evaluates the first derivative of a polynomial.

Coefficient order is descending: aCoeffs(0) is the coefficient of the highest power and the last entry is the constant term, so a vector of length n+1 describes a polynomial of degree n. This is the convention Armadillo and MATLAB use, and it is the opposite of the ascending order some other libraries take. Getting it backwards produces a plausible-looking wrong answer rather than an error.