1-D digital filter runtime

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Peter Cook
Peter Cook el 27 de Mzo. de 2015
Comentada: Star Strider el 27 de Mzo. de 2015
Quick question - Is there any computational savings to padding input arrays for the filter function to a power of 2?

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Star Strider
Star Strider el 27 de Mzo. de 2015
Not that I’m aware of. It would likely do the opposite. (It could also introduce artefactual ‘ringing’ in the output with a sharp transition to zeros.)
Also, use the filtfilt function if you have the Signal Processing Toolbox. It has the advantage of not introducing any phase distortion. The filter function does.
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Peter Cook
Peter Cook el 27 de Mzo. de 2015
Good deal. I was messing around with repmat() and padarray() for that padding, but filtfilt on an unpadded array seems to get me what I was looking for.
Thanks much.
Star Strider
Star Strider el 27 de Mzo. de 2015
My pleasure!

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