org.apache.commons.math3.analysis.polynomials
Class PolynomialFunctionTest

java.lang.Object
  org.apache.commons.math3.analysis.polynomials.PolynomialFunctionTest

public final class PolynomialFunctionTest
extends Object

Tests the PolynomialFunction implementation of a UnivariateFunction.

Version:

$Id: PolynomialFunctionTest.java 1244107 2012-02-14 16:17:55Z erans $

tolerance

protected double tolerance

Error tolerance for tests

PolynomialFunctionTest

public PolynomialFunctionTest()

testConstants

public void testConstants()

tests the value of a constant polynomial.

value of this is 2.5 everywhere.

testLinear

public void testLinear()

tests the value of a linear polynomial.

This will test the function f(x) = 3*x - 1.5

This will have the values f(0) = -1.5, f(-1) = -4.5, f(-2.5) = -9, f(0.5) = 0, f(1.5) = 3 and f(3) = 7.5

testQuadratic

public void testQuadratic()

Tests a second order polynomial.

This will test the function f(x) = 2x^2 - 3x -2 = (2x+1)(x-2)

testQuintic

public void testQuintic()

This will test the quintic function f(x) = x^2(x-5)(x+3)(x-1) = x^5 - 3x^4 -13x^3 + 15x^2

testfirstDerivativeComparison

public void testfirstDerivativeComparison()

tests the firstDerivative function by comparison

This will test the functions f(x) = x^3 - 2x^2 + 6x + 3, g(x) = 3x^2 - 4x + 6 and h(x) = 6x - 4

testString

public void testString()

testAddition

public void testAddition()

testSubtraction

public void testSubtraction()

testMultiplication

public void testMultiplication()

testSerial

public void testSerial()

testMath341

public void testMath341()

tests the firstDerivative function by comparison

This will test the functions f(x) = x^3 - 2x^2 + 6x + 3, g(x) = 3x^2 - 4x + 6 and h(x) = 6x - 4

checkPolynomial

public void checkPolynomial(PolynomialFunction p,
                            String reference)