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fsolve_zero (MathScript RT Module Function)

LabVIEW 2012 MathScript RT Module Help

Edition Date: June 2012

Part Number: 373123C-01

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Owning Class: zerofinder

Requires: MathScript RT Module


y = fsolve_zero(fun, y0)

Legacy Name: fzero


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



Name Description
fun Specifies the name of the function, defined and saved in a .m file, 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.


The following table lists the support characteristics of this function.

Supported in the LabVIEW Run-Time Engine No
Supported on RT targets Yes
Suitable for bounded execution times on RT Not characterized


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 = fsolve_zero('nonlinzero', 1)

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