How to correct for drift in a signal not using detrend

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Rebecca Ellis
Rebecca Ellis 2018-10-2
编辑： dpb 2018-10-2
I have a 30 hour data set, where I am interested in taking out the drift the last 10 hours of the dataset. It is very important to keep the dataset at the same length as I started as I have other sensors in the system that I am looking at with this signal. I have tried:
sdata = oxygen_unisense.data;
oxygen_unisense.detrend = detrend(sdata(3.715958429982246e+06:end));
oxygen_unisense.mean = oxygen_unisense.data - oxygen_unisense.detrend;
but this puts the part of the signal to zero.
Anyone with suggestions?
Data: https://www.dropbox.com/s/c8uy84e2ndem1nl/oxygen_unisensemathelp.mat?dl=0
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dpb
dpb 2018-10-2
编辑：dpb 2018-10-2
Only need the section of interest and it could be decimated by 10X or more and saved as .mat file and be just as useful as the full thing.
detrend ought to be able to do what your code does automagically given the breakpoint(s).

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