a spike at the end of signal in swt

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a on 31 Jan 2013

Closed: MATLAB Answer Bot on 20 Aug 2021

I used 4 level swt to extract 512 data.

level=4;
wname = 'haar';
[swa,swd] = swt(data,level, wname);

It's always show a little spike at the end of d1-d4 signals and also dramticaly drop in a4 signal.

So how to eliminate this spike?

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