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Interpolate 1D Fourier (G Dataflow)

Last Modified: March 15, 2017

Performs one-dimensional Fourier interpolation. This node transforms an array of tabulated values into the frequency domain, zero-pads and scales the array appropriately for the interpolation factor you want to maintain correct symmetry in the frequency domain, and then transforms back into the time domain to form the output interpolated array.

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X

Tabulated values to be interpolated.

It is assumed that the data in X are equally spaced samples along its x-axis.

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n

Interpolation size or interpolation factor.

n is determined by the setting of type.

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dt in

The sampling interval.

This node computes dt out depending on dt in and the interpolation settings n and type.

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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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type

Method for determining the size of the interpolated output array.

Name Value Description
interpolation size 0 Output size = n
interpolation factor 1 Output size = n * size of X

Default: interpolation factor

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Y

Output array of interpolated values.

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interpolation size

Size of the interpolated output array.

If type is interpolation size, interpolation size returns n. If type is interpolation factor, interpolation size returns n * size of X.

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dt out

The sampling interval of the output array.

This output returns dt in * N/m, where N is the size of X, and m is the interpolation size (determined by n and type).

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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.

Where This Node Can Run:

Desktop OS: Windows

FPGA: This product does not support FPGA devices


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