Documentation/How Tos/Calc: BESSELI function

BESSELI

Calculates the modified Bessel function of the first kind.

Syntax:

BESSELI(x; n)

returns the modified Bessel function of the first kind, of order n, evaluated at x.

The modified Bessel function of the first kind I_n(x) = i^-nJ_n(ix), where J_n is the * Bessel function of the first kind.

Example:

BESSELI(1; 1)

returns 0.565159103992.

Issues:

• This function currently appears in the AddIn category of the Function Wizard.

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