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

Export assignment digamma

• digamma(x: number): number

• Evaluates the digamma function.

  Notes

  • If x is zero or a negative integer, the function returns NaN.

  Parameters

  • x: number

    input value

  Returns number

  function value

  Example

  var v = digamma( -2.5 );
  // returns ~1.103

  Example

  var v = digamma( 1.0 );
  // returns ~-0.577

  Example

  var v = digamma( 10.0 );
  // returns ~2.252

  Example

  var v = digamma( NaN );
  // returns NaN

  Example

  var v = digamma( -1.0 );
  // returns NaN