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Script problem about designing a low pass filter

Script problem about designing a low pass filter

‎08-12-2025 03:19 AM - edited ‎08-12-2025 03:23 AM

Hello everyone i am trying to filter a signal named <head x acc unfiltered>

but when I want to apply the filter designed ,it shows the message about the tuple index is out of range

what is wrong with my script or how can I debug it ?

illustration of my scriptillustration of my script

 

problem show up when run the scriptproblem show up when run the script

 

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Re: Script problem about designing a low pass filter

‎10-10-2025 07:59 AM - edited ‎10-10-2025 08:02 AM

Hi Max,

 

The error "tuple index out of range" occurs because the array retrieved from the channel "head x acc unfiltered" has a shape that is not compatible with SciPy’s filtfilt  function. To resolve this, simply apply .flatten() to the array to ensure it is one-dimensional: 
input = np.array(oMyChn.Values).flatten()

Regards

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