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FIR filter warning

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Magdalena Rós

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Jul 15, 2013, 6:24:10 AM7/15/13
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Hi all,

I have designed a FIRpm filter to filter my gait data (3D accelerations) and now when I run the filter I get a warning saying:

"Warning: The first two inputs are interpreted as a transfer function. Normalize the
denominator coefficients (a01 must be equal to 1) if you meant to specify an SOS matrix.
> In filtfilt>getCoeffsAndInitialConditions at 98
In filtfilt at 67"

I am relatively new to matlab so I was hoping someone could tell me what this means.

Thanks!
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