Filter Class Reference

Filter is pure virtual class describing the basic virtual interface for all filters More...

#include <Filter.h>

Inheritance diagram for Filter:

Public Member Functions
	Filter ()
	Constructor.
double	get () const
	Get the latest value.
	operator double ()
	Get the latest value.
virtual double	next (double y)=0
	Update the value. All inherited classes need to update value in next().
virtual void	reset ()=0
	Reset the filter state.

Protected Attributes
double	value

Detailed Description

Filter is pure virtual class describing the basic virtual interface for all filters

Basic usage:

FilterAverage a(3);
cout<<a.next(3)<<endl;
cout<<a.next(3.2)<<endl;
cout<<a.next(1.3)<<endl;
cout<<a.next(2.9)<<endl;

The Filter library provides also the assignment operators (operator=) to simplify the process where you want to replace existing double's in code with filtered values. For example if you want to filter the d over time in the following code...

double d;
cout<<(d = 3)<<endl;
cout<<(d = 3.2)<<endl;
cout<<(d = 1.3)<<endl;
cout<<(d = 2.9)<<endl;

...you can add filter just by replacing the double with the selected filter:

FilterDoubleExponentialSmoothing d(0.2,0.5);
cout<<(d = 3)<<endl;
cout<<(d = 3.2)<<endl;
cout<<(d = 1.3)<<endl;
cout<<(d = 2.9)<<endl;

However, using the assignment operator for setting time series data is a little counter-intuitive, so please use next() instead when possible.

Note

All inherited classes need to update value in next()

Definition at line 80 of file Filter.h.

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

• Filter.h