1-D digital filter runtime

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Peter Cook
Peter Cook 2015-3-27
评论： Star Strider 2015-3-27
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 2015-3-27
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 2015-3-27
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.

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