edu.rit.numeric

Class SampledXYSeries

java.lang.Object

edu.rit.numeric.XYSeries

edu.rit.numeric.SampledXYSeries

public class SampledXYSeries
extends XYSeries

Class SampledXYSeries provides a series of (x,y) pairs of real values (type double) where the Y values are computed by sampling a Function for a series of X values.

Class SampledXYSeries is implemented to minimize space rather than time. Each time x() is called, the x value is computed anew. Each time y() is called, the x value is computed anew, then the y value is computed anew by evaluating the function at x.

Nested Class Summary

Nested classes/interfaces inherited from class edu.rit.numeric.XYSeries

XYSeries.Regression

Constructor Summary

Constructors

Constructor and Description
SampledXYSeries(Function theFunction, double xinit, double delta, int len) Construct a new sampled series sampling values of the given function.

Method Summary

Modifier and Type	Method and Description
int	length() Returns the number of values in this series.
double	x(int i) Returns the given X value in this series.
double	y(int i) Returns the given Y value in this series.

Methods inherited from class edu.rit.numeric.XYSeries

isEmpty, linearRegression, maxX, maxY, minX, minY, print, print, print, xSeries, ySeries

Methods inherited from class java.lang.Object

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

Constructor Detail

SampledXYSeries

public SampledXYSeries(Function theFunction,
                       double xinit,
                       double delta,
                       int len)

Construct a new sampled series sampling values of the given function. The y values at indexes 0, 1, 2, ... len-1 are computed by evaluating theFunction at the x values xinit, xinit+delta, xinit+2*delta, ... xinit+(len-1)*delta.

Parameters:

theFunction - Function to sample.

xinit - Initial x value.

delta - Difference between successive x values.

len - Length (number of (x,y) pairs).

Throws:

java.lang.NullPointerException - (unchecked exception) Thrown if theFunction is null.

java.lang.IllegalArgumentException - (unchecked exception) Thrown if len is less than 0.

Method Detail

length

public int length()

Returns the number of values in this series.

Specified by:

length in class XYSeries

Returns:

Length.

x

public double x(int i)

Returns the given X value in this series.

Specified by:

x in class XYSeries

Parameters:

i - Index.

Returns:

The X value in this series at index i.

Throws:

java.lang.ArrayIndexOutOfBoundsException - (unchecked exception) Thrown if i is not in the range 0 .. length()-1.

y

public double y(int i)

Returns the given Y value in this series.

Specified by:

y in class XYSeries

Parameters:

i - Index.

Returns:

The Y value in this series at index i.

Throws:

java.lang.ArrayIndexOutOfBoundsException - (unchecked exception) Thrown if i is not in the range 0 .. length()-1.