Use of filter when using cumtrapz

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Bran
Bran 2015-1-20
编辑： Matt J 2015-1-24
I have created a perfect sine wave which i am doing various calculations on however when it comes to integrating using cumtrapz I find myself having to use a filter on the data in order to obtain sensible results. I am wondering why do I see drift in my data as I have a near perfect wave? Also I am wondering about he effect of a filter. Does a filter take data that is oscillating around a particular value and center it around zero
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Matt J
Matt J 2015-1-24
编辑：Matt J 2015-1-24
To help you find bugs in your code, we have to see that code...

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