Eval Single-Variable Scalar (Not in Base Package)

Calculates exactly one function value of a given 1D function

where f is the function specified by the user formula. Details

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 VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurs before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
code is the error or warning code. The default is 0. If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
y value is the value of formula (X Values).
error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.
status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
code is the error or warning code. If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

Eval Single-Variable Scalar Details

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

This 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.

The inputs

formula = x*sin(x)

and

x value = 2.56

result in

y value = 1.41.