Eval Single-Variable Scalar VI

Owning Palette: 1D & 2D Evaluation VIs

Requires: Full Development System

Calculates exactly one function value of a given 1D function y = f(x), where f is the function specified by the user formula.

Details  

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	formula is a string representing the function under investigation. Only one variable can be integrated in this formula.
	x value is the 1D point, x, at which the value of the function, given by the formula, has to be calculated.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	y value is the value of formula(x value).
	error out contains error information. This output provides standard error out functionality.

Eval Single-Variable Scalar Details

Refer to the Eval Single-Variable Array VI for an example that applies to the Eval Single-Variable Scalar VI, except that x value and y value are scalars for the Eval Single-Variable Scalar VI.

The Eval Single-Variable Scalar VI calculates only one value of a given 1D function. It is difficult to analyze the formula in the background. Therefore, if you want to calculate a collection of Eval Single-Variable Scalar VIs, use the Eval Single-Variable Array, Parse Formula String, and Eval Parsed Formula String VIs.

For an example of using the Eval Single-Variable Scalar VI, enter the following values on the front panel:

• formula: x*sin(x)
• x value: 2.56

The resulting y value is 1.41.