FirstDerivative

java.lang.Object

org.opensourcephysics.cabrillo.tracker.FirstDerivative

All Implemented Interfaces:: Derivative

public class FirstDerivative extends Object implements Derivative

This implements an algorithm for finding a first derivative.

Author:: Douglas Brown

Constructor Summary

Constructors

Constructor

Description

FirstDerivative()
Method Summary

Modifier and Type

Method

Description

Object[]

evaluate(Object[] data)

Evaluates the derivative.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- FirstDerivative
  
  public FirstDerivative()
Method Details
- evaluate
  
  public Object[] evaluate(Object[] data)
  
  Evaluates the derivative. Input data: data[0] = parameters (int[] {spill, start, stepsize, count}) data[1] = xData (double[]) data[2] = yData (double[]) (may be null for 1d data) data[3] = validData (boolean[]) Returned result: result[0] = xDeriv (double[]) (invalid values are NaN) result[1] = yDeriv (double[]) (invalid values are NaN) (null if input data[2] is null) result[2] = null result[3] = null
  
  Specified by:
  
  evaluate in interface Derivative
  
  Parameters:
  
  data - the input data
  
  Returns:
  
  Object[] the result