fzero (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 zerofinder class.

Syntax

y = fzero(fun, y0)

Uses a nonlinear equation solver to determine the y-value in a nonlinear equation.

Name	Description
fun	Specifies the name of the function that describes the nonlinear equation. The function must have the following form: function fx = fun(x). fun is a string.
y0	Specifies the y-value of the starting value. y0 is a real, double-precision scalar. To generate a valid approximation, y0 must be reasonably close to a solution.

Name	Description
y	Returns the y-value LabVIEW approximates. y is a real, double-precision scalar.

This function is not supported in the LabVIEW Run-Time Engine. Do not use this function in a stand-alone application or shared library.

Save the following script as nonlinzero.m in a directory in the MathScript search path:

function fx = nonlinzero(x)
% The nonlinear equation is defined by:
% sin(x - 3) + (x - 2) = 0
fx = sin(x - 3) + (x - 2);

Then call the following command in the LabVIEW MathScript Window:

y = fzero('nonlinzero', 1)