External module "math/base/special/betaincinv/docs/types/index.d"

Export assignment betaincinv

• betaincinv(p: number, a: number, b: number, upper?: undefined | false | true): number

• Computes the inverse of the lower incomplete beta function.

  Notes

  • In contrast to a more commonly used definition, the first argument is the probability p and the second and third arguments are a and b, respectively.
  • By default, the function inverts the lower regularized incomplete beta function. To invert the upper function, set the upper argument to true.
  • If provided NaN as any argument, the function returns NaN.
  • If provided p < 0 or p > 1, the function returns NaN.
  • If provided a <= 0 or b <= 0, the function returns NaN.

  Parameters

  • p: number

    function parameter

  • a: number

    function parameter

  • b: number

    function parameter

  • Optional upper: undefined | false | true

    boolean indicating if the function should return the inverse of the upper tail of the incomplete beta function (default: false)

  Returns number

  function value

  Example

  var y = betaincinv( 0.2, 3.0, 3.0 );
  // returns ~0.327

  Example

  var y = betaincinv( 0.4, 3.0, 3.0 );
  // returns ~0.446

  Example

  var y = betaincinv( 0.4, 3.0, 3.0, true );
  // returns ~0.554

  Example

  var y = betaincinv( 0.4, 1.0, 6.0 );
  // returns ~0.082

  Example

  var y = betaincinv( 0.8, 1.0, 6.0 );
  // returns ~0.235