bessel (MathScript Function) (Windows, Not in Base Package)

LabVIEW 8.5 Help
August 2007

NI Part Number:
371361D-01

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Member of the advanced class.

Syntax

jv = bessel(v, x)

jv = bessel(v, x, 1)

[jv, error] = bessel(v, x)

[jv, error] = bessel(v, x, 1)

Computes the Bessel function of the first kind of a given order.

Name	Description
v	Specifies the order of the Bessel function. v is a real, double-precision, floating-point positive scalar, vector, or matrix.
x	Specifies the value for which you want to compute the Bessel function. x is a real or complex, double-precision, floating-point scalar, vector, or matrix.
1	Scales the computation. besselj(v, x, 1) scales besselj(v, x) by exp(-abs(imag(x))).

Name

Description

Returns the Bessel function of the first kind. jv is a real or complex, double-precision, floating-point scalar, vector, or matrix.

error

Returns error information about the evaluation of the Bessel function. error is an integer that can return the following values.

0	Indicates that no error occurred.
1	Indicates that you specified invalid inputs.
2	Indicates that the result is too large for the data type of jv. Use the scaling option 1.
3	Indicates that LabVIEW achieved less than half the machine accuracy in the calculation because \|x\| or v is greater than approximately 1.3E8.
4	Indicates that the result is meaningless because \|x\| or v is greater than approximately 1.8E16.
5	Indicates that the calculation did not reach the termination condition so LabVIEW did not complete the calculation.