Extract the selected region from the harp, pax, and wanc signals. Make sure that the extracted signals are named harp_ROI, pax_ROI, and wanc_ROI respectively and display them

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Layba 2024-3-26

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回答： Tanzil Ahmed 2025-2-26

TASK

Extract the selected region from the harp, pax, and wanc signals. Make sure that the extracted signals are named harp_ROI, pax_ROI, and wanc_ROI respectively and display them.

Incorrect

Are the harp_ROI, pax_ROI, and wanc_ROI signals plotted?

Have all three signals been cropped?

How to crop it? And I cant find resample freq. also.

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Tanzil Ahmed 2025-2-26

How to crop it? And I cant find resample freq. also.

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Answer 1

Brahmadev 2024-4-4

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Hi @Layba,

I am assuming that these are output signals from a simulation and stored in your workspace. Cropping the signal or extracting a certain part of it can be done simply by:

% Let's say you want to crop the signals between indices startIdx and endIdx.
startIdx = 101; % Example start index
endIdx = 200; % Example end index
% Cropping the signals
harp_ROI = harp(startIdx:endIdx);
pax_ROI = pax(startIdx:endIdx);
wanc_ROI = wanc(startIdx:endIdx);

For resampling the signal, you can use the resample function in MATLAB and choose any desired frequency you would like:

Fs_original = 1000; % Original sampling frequency in Hz
Fs_new = 500; % New desired sampling frequency in Hz
% Resampling the signal
harp_resampled = resample(harp, Fs_new, Fs_original);

Refer to the following documentation for more information:

https://www.mathworks.com/help/signal/ref/resample.html

Hope this helps!