DGtal  1.4.beta
DGtal::MPolynomialDerivativeComputer< N, n, Ring, Alloc > Class Template Reference

#include <DGtal/math/MPolynomial.h>

## Public Types

typedef MPolynomial< n, Ring, Alloc > MPolyN
Type for polynomial with n variable in the ring Ring. More...

## Static Public Member Functions

static void computeDerivative (const MPolyN &src, MPolyN &dest)

## Detailed Description

### template<int N, int n, typename Ring, typename Alloc> class DGtal::MPolynomialDerivativeComputer< N, n, Ring, Alloc >

Utility class for computing the derivative of a given polynomial with respect to the N-th indeterminate, N > 0. Uses MPolynomialDerivativeComputer<N-1, n-1, T, Alloc> to partially derive the coefficients of the first indeterminate.

Template Parameters
 N the variable used for derivation. n the number of variables or indeterminates. Ring the type chosen for the polynomial, defines also the type of the coefficents (generally int, float or double). Alloc is an allocator for Ring, for example std::allocator; this is also the default parameter. Usually this parameter does not needs to be changed.

This class is a backport from Spielwiese.

Definition at line 1897 of file MPolynomial.h.

## ◆ MPolyN

template<int N, int n, typename Ring , typename Alloc >
 typedef MPolynomial DGtal::MPolynomialDerivativeComputer< N, n, Ring, Alloc >::MPolyN

Type for polynomial with n variable in the ring Ring.

Definition at line 1901 of file MPolynomial.h.

## ◆ computeDerivative()

template<int N, int n, typename Ring , typename Alloc >
 static void DGtal::MPolynomialDerivativeComputer< N, n, Ring, Alloc >::computeDerivative ( const MPolyN & src, MPolyN & dest )
inlinestatic

Computes the derivative of src with respect to X_N and puts it in dest.

Parameters
 src any polynomial dest (returns) the polynomial d/dX_N(src).

Definition at line 1911 of file MPolynomial.h.

1912  {
1913  dest.myValue.resize(src.degree() + 1);
1914  for ( int i = 0; i <= src.degree(); ++i )
1915  MPolynomialDerivativeComputer<N - 1, n - 1, Ring, Alloc>
1916  ::computeDerivative( src[i], dest[i] );
1917  dest.normalize();
1918  }
static void computeDerivative(const MPolyN &src, MPolyN &dest)
Definition: MPolynomial.h:1911

Referenced by DGtal::derivative().

The documentation for this class was generated from the following file: