BESSEL returns the Bessel function value for a numerical expression, based on the indicated order.

Syntax

BESSEL(FunctionType$, NumExp)

Arguments

...

Modified Bessel function of the first kind;

BESSEL("I1", 0.3) returns 0.15169383946249

...

Bessel function, first kind, first order:

BESSEL("J1", 0.3) returns 0.14831881628779

...

Bessel function, second kind, first order:

BESSEL("Y1", 0.3) returns -2.29310513710031

...

Bessel function, second kind, first order:

BESSEL("K1", 0.3) returns 3.05599204051877

...

A is the input value, B1, B2, B3, B4 are the four alternative BESSEL functions.

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