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Evaluate f(x1,x2) (f(a,x1,x2)) (G Dataflow)

Last Modified: January 12, 2018

Calculates a 2D array of function values defined on a grid with parameters.

You can integrate an arbitrary set of parameters in the formula.

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number of points

Numbers of values for both variables used in the function calculation.

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formula

Function to calculate that contains the variables and parameters. The formula 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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start

Start values of the variables in the interval where this node starts calculating values.

This input can contain only two elements. Otherwise, this node returns an error.

Default: [0.00, 0.00]

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end

End values of the variables in the interval where this node stops calculating values.

This input can contain only two elements. Otherwise, this node returns an error.

Default: [1.00, 1.00]

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variables

Names of the variables.

Variable names must start with a letter or an underscore followed by any number of alphanumeric characters or underscores.

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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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parameters

Variables and their corresponding values in the parameters.

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variable

Name of the parameter that uses the conventions of the Parsing nodes.

Default: Empty string

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value

Value of variable.

Default: 0

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exclude end

Boolean that specifies whether this node uses the end value of the interval when calculating function values.

True Does not use the end value when calculating function values.
False Uses the end value when calculating function values.

Default: False

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x1 values

1D array of the used x1 arguments.

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x2 values

1D array of the used x2 arguments.

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y values

2D array of the calculated function values.

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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 equation is a common function in x1 and x2:

f(a, b, x1, x2) = a * sinc(gamma(x1 + x2)) - b * sin(x1) * cos(x2) with a = 1 and b = 2

You enter only the right side of this equation in formula:

a*sinc(gamma(x1 + x2)) - b*sin(x1) *cos(x2)

You enter the values of variables a and b in parameters:

  • parameters(0)a: 1.00
  • parameters(1)b: 2.00

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application


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