Why does the filtered samples of my high pass filter (12th order) look distorted in the time domain when I use the 'filter' command? The filter is designed with the butter command with a very low cut-off frequency of 0.65Hz. The frequency of the signal is 25Hz.
MATLAB: Distorted time domain signal for high pass butterworth filter designed using ‘butter’ command and filtered using ‘filter’ command
Signal Processing Toolbox
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