qlibs::smootherDESF Class Reference

Double exponential smoothing (Holt’s Method) More...

#include <smoother.hpp>

Inheritance diagram for qlibs::smootherDESF:

Public Member Functions
virtual	~smootherDESF ()
bool	setup (const real_t a, const real_t b, const size_t nS)
	Setup an initialize the Double exponential smoothing instance.
real_t	smooth (const real_t x) override
	Perform the smooth operation recursively for the input signal x.
Public Member Functions inherited from qlibs::smoother
virtual	~smoother ()
bool	isInitialized (void) const
	Check if the smoother filter has been initialized using setup().
	operator bool () const noexcept
	Check if the smoother filter has been initialized using setup().
bool	reset (void)
	Reset the smoother filter.

Detailed Description

Double exponential smoothing (Holt’s Method)

Constructor & Destructor Documentation

~smootherDESF()

virtual qlibs::smootherDESF::~smootherDESF ( )

inlinevirtual

Member Function Documentation

setup()

bool smootherDESF::setup	(	const real_t	a,
		const real_t	b,
		const size_t	nS )

Setup an initialize the Double exponential smoothing instance.

Parameters

[in]	a	Weight for the level [ 0 < a < 1 ]
[in]	b	Weight for the trend [ 0 < b < 1 ]
[in]	nS	Number of steps for the forecast

Returns

true on success, otherwise return false.

smooth()

real_t smootherDESF::smooth ( const real_t x )

overridevirtual

Perform the smooth operation recursively for the input signal x.

Precondition

Instance must be previously initialized

Parameters

[in]

x

A sample of the input signal.

Returns

The smoothed output.

Implements qlibs::smoother.