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