Formualizer Docs
ReferenceFunctionsEngineering Functions

BESSELK

BESSELK: Returns the modified Bessel function Kn(x).

Summary

Computes the modified Bessel function of the second kind for a positive real value x and a non-negative integer order n.

Remarks

  • Arguments are supplied as BESSELK(x, n).
  • x must be positive and n must truncate to a non-negative integer.
  • Invalid domains or non-finite results return #NUM!.

Examples

First-order modified Bessel K
Grid
CellValue
No inputs on Sheet1.
Formula
=
Result
Not evaluated yet.
Expected
1.656441120003301
Zero-order modified Bessel K
Grid
CellValue
No inputs on Sheet1.
Formula
=
Result
Not evaluated yet.
Expected
0.9244190712276659

FAQ

Why can BESSELK return #NUM!?

BESSELK is undefined for non-positive x values and negative orders.

Runtime metadata

Category

Engineering

Signature

BESSELK(arg1: Any, arg2: Any)

Arity

min 2, max 2

Arguments

arg1

Any · Scalar

arg2

Any · Scalar

Caps

PURE

Source

crates/formualizer-eval/src/builtins/engineering.rs

BESSELJ

BESSELJ: Returns the Bessel function Jn(x).

BESSELY

BESSELY: Returns the Bessel function Yn(x).

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SummaryRemarksExamplesRelated functionsFAQWhy can BESSELK return #NUM!?Runtime metadata