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Evaluate Formula Node (Formula) (G Dataflow)

Version:
    Last Modified: March 15, 2017

    Evaluates mathematical formulas and expressions with variables.

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    formula

    Equations to calculate, with output variables on the left and input variables on the right. If you have multiple equations to calculate, separate them with semicolons. The equations can contain any number of valid variables.

    Entering Valid Variables

    This node accepts variables that use the following format rule: variables must start with a letter or an underscore followed by any number of alphanumeric characters or underscores.

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    input values

    Values for the input variables that this node uses to calculate function values. input values has a one-to-one relation with variables input.

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    variables input

    Input variables from the right side of the equations in formula.

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    variables output

    Output variables from the left side of the equations in formula.

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    error in

    Error conditions that occur before this node runs.

    The node responds to this input according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Default: No error

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    output values

    Function values of the output variables. output values has a one-to-one relation with variables output.

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    error out

    Error information.

    The node produces this output according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    The following table shows an example of the inputs and outputs of this node.

    formula input values variables input variables output output values
    y = 3*x + 4*z; p = q^2 - 5 [1, 2, 3] [x, z, q] [y, p] [11.00, 4.00]

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: This product does not support FPGA devices


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