pzapplet
Class ComplexToPoly

java.lang.Object
  pzapplet.ComplexToPoly

public class ComplexToPoly

extends java.lang.Object

This class calculates a single polynomial from any number of real or complex conjugate poles. Complex poles must have a conjugate, as this class uses that assumption to make fewer calculations. This takes a complex array of values and makes available a single polynomial. The terms of the polynomial are represented in an array, where the index of the array corresponds to the value of that power. Representation: poly[x]=y is the equivalent of y*(s^x). Additional data stored is the degree of the polynomial, to avoid needing to search the polynomial for the highest non-zero coefficient. The number of points at the origin are also available through a separate method.

Author:

Brian Williams

Constructor Summary

ComplexToPoly(ORG.netlib.math.complex.Complex[] complex)
Creates a new ComplexToPoly with the given complex values

Method Summary

int	getDegree()
double[]	getPoly()
int	getZeros()
java.lang.String	toNormalizedString()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ComplexToPoly

public ComplexToPoly(ORG.netlib.math.complex.Complex[] complex)

Creates a new ComplexToPoly with the given complex values

Parameters:

complex - Complex[] of values to turn into a polynomial

Method Detail

getDegree

public int getDegree()

Returns:

the highest degree of the polynomial

getPoly

public double[] getPoly()

Returns:

coefficients of the polynomial from lowest to highest

toString

public java.lang.String toString()

toNormalizedString

public java.lang.String toNormalizedString()

Returns:

this in readable form, scaled so that the highest-order polynomial is 1.

getZeros

public int getZeros()

Returns:

int representing the number of points at the origin