net.aerith.misao.util
Class RegressionEquation

java.lang.Object
  |
  +--net.aerith.misao.util.RegressionEquation

public class RegressionEquation

extends java.lang.Object

The RegressionEquation represents a regression equation:

     y = gradient * x + constant
 

Field Summary

private double	constant The constant.
private int	data_count The number of (x,y) data to solve the simultaneous equation.
private double	gradient The gradient.
private SimultaneousEquation	se The simultaneous equation to solve this regression equation.

Constructor Summary

RegressionEquation()
Constructs an empty RegressionEquation.

Method Summary

java.lang.String	getOutputString() Returns a string representation of the state of this object.
double	getValue(double x) Gets y value of the specified x.
void	setData(double x, double y) Adds a (x,y) data to solve the simultaneous equation.
void	solve() Solves the simultaneous equation and calculates this regression equation in the least square method.

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait

Field Detail

constant

private double constant

The constant.

gradient

private double gradient

The gradient.

se

private SimultaneousEquation se

The simultaneous equation to solve this regression equation.

data_count

private int data_count

The number of (x,y) data to solve the simultaneous equation.

Constructor Detail

RegressionEquation

public RegressionEquation()

Constructs an empty RegressionEquation.

Method Detail

getValue

public double getValue(double x)

Gets y value of the specified x.

Parameters:

x - the x value.

Returns:

y value of the specified x.

setData

public void setData(double x,
                    double y)

Adds a (x,y) data to solve the simultaneous equation.

Parameters:

x - the x value.

y - the y value.

solve

public void solve()

Solves the simultaneous equation and calculates this regression equation in the least square method.

getOutputString

public java.lang.String getOutputString()

Returns a string representation of the state of this object.

Returns:

a string representation of the state of this object.