org.opensourcephysics.cabrillo.tracker
Interface Derivative

All Known Implementing Classes:

BounceDerivatives, FirstDerivative, SecondDerivative

public interface Derivative

A Derivative implements an algorithm for finding a first, second or both derivatives.

Author:

Douglas Brown

Method Summary

java.lang.Object[]

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

Method Detail

evaluate

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

Evaluates the derivative(s). 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] = firstDerivX (double[]) may be null result[1] = firstDerivY (double[]) may be null result[2] = secondDerivX (double[]) may be null result[3] = secondDerivY (double[]) may be null Note: result values may be NaN if no derivative could be determined

Parameters:

data - the input data

Returns:

Object[] result