org.opensourcephysics.cabrillo.tracker
Class FirstDerivative

java.lang.Object
  org.opensourcephysics.cabrillo.tracker.FirstDerivative

All Implemented Interfaces:

Derivative

public class FirstDerivative
extends java.lang.Object
implements Derivative

This implements an algorithm for finding a first derivative.

Author:

Douglas Brown

Constructor Summary

FirstDerivative()

Method Summary

java.lang.Object[]

evaluate(java.lang.Object[] data) Evaluates the derivative.

Methods inherited from class java.lang.Object

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

Constructor Detail

FirstDerivative

public FirstDerivative()

Method Detail

evaluate

public java.lang.Object[] evaluate(java.lang.Object[] data)

Evaluates the derivative. Input data: data[0] = parameters (int[] {spill, start, stepsize, count}) data[1] = xData (double[]) data[2] = yData (double[]) data[3] = validData (boolean[]) Returned result: result[0] = xDeriv (double[]) (invalid values are NaN) result[1] = yDeriv (double[]) (invalid values are NaN) result[2] = null result[3] = null

Specified by:

evaluate in interface Derivative

Parameters:

data - the input data

Returns:

Object[] the result