I was hoping someone might be able to help me, I am not very good with Matlab so I apologise if this is a stupid question.
I have a series of data that changes over time from being negative to positive. I would like to detect the point at which the data crosses zero. I believe the best way to do this is using a spline curve but I am not sure how to write the routine. Can anyone help me please?!
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The Curve Fitting Toolbox gives lots of different functions for fitting splines to your data
You could then use FNZEROS to find their zero crossings.
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