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Owning Palette: Wavelet Packet VIs

Installed With: Advanced Signal Processing Toolkit

Reads the wavelet packet (WP) coefficients of a terminal node that path specifies. If you want to read the coefficients of a non-terminal node, use the WA WP Join VI to convert the node to a terminal node.

Examples

	WP session is a reference to an existing wavelet packet structure.
	path specifies the path associated with a node of the wavelet packet tree. For this VI, path must refer to a terminal node of the wavelet packet tree. path is a combination of the characters 0 and 1, where 0 represents lowpass filtering, and 1 represents highpass filtering. For example, a value of 101 indicates that the VI passes the signal through a highpass filter, through a lowpass filter, and then through a highpass filter. path can be root, which represents the original signal without any filtering operation.
	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 occurred 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 nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies 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.
	WP session out contains a reference to an existing wavelet packet structure, which this VI can modify.
	node coef contains the wavelet packet coefficients of the terminal node that path specifies.
	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. 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 nonzero 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.

Examples

Refer to the following VIs for examples of using the WA WP Read Node VI:

• Wavelet Packet - Read and Write Coefficients VI: labview\examples\Wavelet Analysis\WAGettingStarted.llb
• Wavelet Packet - Read Entropy VI: labview\examples\Wavelet Analysis\WAGettingStarted.llb
• Wavelet Packet Signal Compression VI: labview\examples\Wavelet Analysis\WAApplications.llb