Convolution and Correlation Express VI
Owning Palette: Signal Analysis Express VIs
Installed With: Full Development System
Performs convolution, deconvolution, or correlation on the input signals.
| Dialog Box Options |
| Block Diagram Inputs |
| Block Diagram Outputs |
Dialog Box Options
| Parameter | Description |
|---|---|
| Signal Processing | Contains the following options:
|
| Sample Input Data | Displays sample input signals you can use as a reference to determine how the configuration options you select affect the actual input signals. If you wire data to the Express VI and run it, Sample Input Data displays real data. If you close and reopen the Express VI, Sample Input Data displays sample data until you run the VI again. |
| Result Preview | Displays a preview of the measurement. The Result Preview plot indicates the value of the selected measurement with a dotted line. If you wire data to the Express VI and run the VI, Result Preview displays real data. If you close and reopen the Express VI, Result Preview displays sample data until you run the VI again. If the cutoff frequency values are invalid, Result Preview does not display valid data. |
Block Diagram Inputs
| Parameter | Description |
|---|---|
| X | Contains the input signal X. |
| X*Y | Contains the set of input data. The number of elements in X*Y must be greater than or equal to the number of elements in Y. If the number of elements in X*Y is less than the number of elements in Y, the VI sets X to an empty array and returns an error. |
| Y | Contains the input signal Y. |
| error in (no error) | Describes error conditions that occur before this VI or function runs. |
Block Diagram Outputs
| Parameter | Description |
|---|---|
| X*Y | Returns the convolution of X and Y. |
| X | Returns the deconvolved sequence of X*Y and Y. The number of elements in X is size = n – m + 1, where n is the number of elements in X*Y , and m is the number of elements in Y. |
| Rxx | Returns the autocorrelation of input signals X and Y. |
| Rxy | Returns the cross correlation of input signals X and Y. |
| 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 front panel indicator and select Explain Error from the shortcut menu for more information about the error. |
This Express VI operates similarly to the following VIs and functions: