MATLAB: How to fit this data

Curve Fitting Toolboxdata fit

Hello all,
I have raw data (column B) and fit data (column A). I am wondering what fit was it?. Can anyone please have a look at the data and fit (graph) and clarify my doubt?. How do I perform it in MatLab?. Kindly help.

Best Answer

Looks more like a smoothing filter than a fitted equation. Perhaps a moving average.
A moving average filter goes over your data point-by-point and calculates an average within a range (window) from that point. See for example the MATLAB functions movmean and smooth . Your fit does not look parametric in nature as it retains the noise (although damped out). More likely some type of filter.
Try smoothing your data with different methods, using the smooth function, and see if you can reproduce the results. If you provide data, I'd be willing to help.
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