How can I use the markers in SPTOOL to crop and save portions of my signal in the Signal Processing Toolbox 6.2 (R14)?

I am using SPTOOL to graphically view my signal. I would like to use the vertical markers to crop and save portions of my signal.

ANSWER

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The ability to crop and save portions of a signal using the vertical markers in SPTOOL is not available in the Signal Processing Toolbox 6.2 (R14).

To work around this issue, try exporting the position of the markers from the Signal Browser, determining the corresponding indices of the data that constitutes the signal, and using the indices to generate a cropped signal. The following example demonstrates this approach using the “train” signal that ships with MATLAB:

1. Type the following at the MATLAB prompt to load a sample signal in the workspace and start SPTool:

load trainsptool

2. Choose “train” and select “View” under the signals portion of the SPTool startup window.

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