Interpolation method for data that is wave-like or oscillatory

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Krispy Scripts 2016-10-21

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评论： Star Strider 2016-10-24

I am attempting to Interp1 for interpolation of data that is wave-like or oscillatory in nature. I am planning on using the 'linear' method, but was wondering if anyone had any suggestions that might be better method in this function for data that is wave-like or oscillatory?

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Star Strider 2016-10-21

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It depends on how ‘wave-like’ it is. A 'linear' interpolation will work in most instances if the sampling interval is small enough. Otherwise, the 'spline' or 'pchip' methods would be appropriate. (Consider adding the 'extrap' argument as well if extrapolation could be an issue. It prevents NaN values from appearing in the extrapolated points.)