How can I determine the x-value of a sudden change in y-values?
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Julia de Lange
le 10 Jan 2018
Commenté : Star Strider
le 11 Jan 2018
I want to determine the start time and end time of that first impulse on the attached graph. I don't want to have to graph every dataset though (I have way too many) so would like to command matlab to do so from a two sets of values I've imported from excel. Does anyone have any suggestions? I'm very new to matlab.
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Star Strider
le 10 Jan 2018
Modifié(e) : Star Strider
le 10 Jan 2018
It would help to have your data, and more detail about the features of your waveform you want to recover.
EDIT — If you have R2017b or later, the ischange function and its friends may also work with your data.
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Star Strider
le 11 Jan 2018
That depends on what you define as ‘major’. The name-value pair arguments can help you isolate the peaks you want.
To return only one peak, use the 'NPeaks' argument:
[pks,locs] = findpeaks(Voltage, 'MinPeakDist',2000, 'NPeaks',1);
Here, only the first peak value and its index will be returned.
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