Class Line

java.lang.Object

Line

public class Line
extends java.lang.Object

COPYRIGHT (C) 2014 Andrew J. Pounds, Ph.D.

A class for line objects.

Constructor Summary

Constructors

Constructor and Description
Line() Simple constructor to create an instance of the Line object
Line(double slope, double yInt) Constructor to create a instance of the Line object and define all instance variables.
Line(double x1, double y1, double x2, double y2) Constructor to create a instance of the Line object and define all instance variables.

Method Summary

Methods

Modifier and Type	Method and Description
double	forecastX(double y) Returns the associated X value on the line for a given Y value
double	forecastY(double x) Returns the associated Y value on the line for a given X value
double	getSlope() Returns the value of the slope
double	getYInt() Returns the value of the Y-Intercept
void	setSlope(double slopeVal) Explicitly sets the value of the slope
void	setYInt(double yIntVal) Explicitly sets the value of the Y-Intercept

Methods inherited from class java.lang.Object

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

Constructor Detail

Line

public Line()

Simple constructor to create an instance of the Line object

Line

public Line(double x1,
    double y1,
    double x2,
    double y2)

Constructor to create a instance of the Line object and define all instance variables.

Parameters:

x1 - - first x-coordinate data point

y1 - - first y-coordinate data point

x2 - - second x-coordinate data point

y2 - - second y-coordinate data point

Line

public Line(double slope,
    double yInt)

Constructor to create a instance of the Line object and define all instance variables.

Parameters:

slope - - the slope of the line

yInt - - the Y-intercept of the line

Method Detail

getSlope

public double getSlope()

Returns the value of the slope

Returns:

slope

getYInt

public double getYInt()

Returns the value of the Y-Intercept

Returns:

yInt

forecastY

public double forecastY(double x)

Returns the associated Y value on the line for a given X value

Parameters:

x - value

Returns:

associated Y value

forecastX

public double forecastX(double y)

Returns the associated X value on the line for a given Y value

Parameters:

y - value. In the event that the slope is zero, an error value of -99999.999 is returned.

Returns:

associated X value

setSlope

public void setSlope(double slopeVal)

Explicitly sets the value of the slope

Parameters:

slopeVal - -- value of the slope

setYInt

public void setYInt(double yIntVal)

Explicitly sets the value of the Y-Intercept

Parameters:

yIntVal - -- value of the Y-Intercept