[SciPy-user] Filtering high frquency noise

Yannick Dirou yannick.dirou at axetic.com
Mon Mar 20 03:37:08 CST 2006


Hello,

I have a multirate signal (from 18 to 24 sample per day), and if i plot 
it i see something like "high frequency" noise (actually not that high 
but higher than the remaining of the signal), i thought about using a 
median filter but this is not good for a multirate signal,
then i though i could use scipy filters to do the job,
unfortunately i know nearly nothing in filter design, and don't know how 
to do the job.

Is there a tutorial or simple example to design a low pass filter?

the signal data is made of a datetime in epoch format and the measured 
value.

Thanks in advance,

Yannick




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