frmag - magnitude of FIR and IIR filters

Calling Sequence

[xm,fr]=frmag(num[,den],npts)

Parameters

• npts : integer (number of points in frequency response)
• xm : mvector of magnitude of frequency response at the points fr
• fr : points in the frequency domain where magnitude is evaluated
• num : if den is omitted vector coefficients/polynomial/rational polynomial of filter
• num : if den is given vector coefficients/polynomial of filter numerator
• den : vector coefficients/polynomial of filter denominator

Description

calculates the magnitude of the frequency responses of FIR and IIR filters. The filter description can be one or two vectors of coefficients, one or two polynomials, or a rational polynomial.

Author

C. B.