Mathematica - Apply filter to measured data

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Author

Apply filter to measured data

Oliver Friedrich

2007-04-25, 8:10 am

Hallo,

I have lists of measured data

{{t0,f[t0]},{t1,f[t1]},...,{tn,f[tn]}}

where the samplepoints are not (!) distributed equidistant.

I want to apply an analog lowpass filter (1. order RC lowpass) to this list
to get a list of the filtered signal. I have the Signals&Systems package,
but the filters need to be applied to a function. So I turned these lists
into InterpolationFunction objects, but they don't work together with the
Signals&Systems toolbox. I tried to convert these InterpolationFunctions
objects into the PiecewiseContinuousData objects, but this didn't work
either with the filters.

Is there a way to use the Signals&Systems toolbox on such lists?

Thank you
Oliver Friedrich

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