How to create indices for specific parts of signal to keep
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Jørgen Fone Pedersen
el 13 de Feb. de 2021
Comentada: Jørgen Fone Pedersen
el 14 de Feb. de 2021
Hi
So i have this signal as shown in the plot, this is currently a 50000x1 vector. I would like to extract only the parts where the amplitude increases, these correspond to the extraction and retraction of a piston rod with a 1s dwell time. I know i can do it manually from looking at the plot and find the indices, but i have 40 different signals and would thus like a automatic process for this.
I would like to find the point where each extraction and retraction cycle starts and ends so i can remove the other parts.
thanks for all help.
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dpb
el 14 de Feb. de 2021
" The signal i attached is actually a shortened version where i took the mean of each 1000 datapoints..."
That's a moving-average filter right there. From the looks of the data, that's probably pretty good first cut. You might want to consider using median instead of mean to preserve the absolute magnitude since the mean will have somewhat of a constricting effect on the range of the observations as well as smoothing.
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