About Digital Filtering Functions
The following functions are used in the design of Finite Impulse Response (FIR) and Infinite Impulse Response (IIR) filters.
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gain—Returns the gain of a filter.
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remez—Returns coefficients for an FIR filter generated by the Remez exchange algorithm.
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filtfilt—Returns the zero-phase response of a filter.
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grpdelay—Returns the group delay imposed by a filter.