适用于任意数据集的MATLAB曲线拟合

Question

I have a data set from an accelerometer sensor. it provides the acceleration value in each 20ms. Now I want to fit a curve to this data set then use Integral to get the speed of the object.

I want to use MATLAB curve fitting, however I don't know what fittype I should use. Is MATLAB able to fit curve for any arbitrary data set or I should isolate data set to different sets and fit curve for each one?

Thanks a lot

Answer 1

Since you don't know what function to use, you could try describing your curve with splines (smoothing splines, such as csaps could be useful).

However, it may be much easier to numerically integrate the data using eg CUMTRAPZ .