Package org.apache.commons.numbers.gamma

Class Erfc

java.lang.Object
org.apache.commons.numbers.gamma.Erfc
public class Erfc
extends java.lang.Object
Complementary error function.

  • Constructor Summary

    Constructors 
    Constructor Description
    Erfc()  

  • Method Summary

    Modifier and Type Method Description
    static double value​(double x)
    This implementation computes erfc(x) using the regularized gamma function, following Erf, equation (3).

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Erfc

      public Erfc()

  • Method Details

    • value

      public static double value​(double x)

      This implementation computes erfc(x) using the regularized gamma function, following Erf, equation (3).

      The value returned is always between 0 and 2 (inclusive). If abs(x) > 40, then erf(x) is indistinguishable from either 0 or 2 at double precision, so the appropriate extreme value is returned.

      Parameters:
      x - Value.
      Returns:
      the complementary error function.
      Throws:
      java.lang.ArithmeticException - if the algorithm fails to converge.
      See Also:
      RegularizedGamma.Q.value(double, double, double, int)