FilterSpecs function

Filter specifications

Filter specifications, including order, frequency cutoff, type, and possibly others.

FilterSpecs(n, Wc, type, ...)

Arguments

• n: filter order.
• Wc: cutoff frequency.
• type: filter type, normally one of "low", "high", "stop", or "pass".
• ...: other filter description characteristics, possibly including Rp for dB of pass band ripple or Rs for dB of stop band ripple, depending on filter type (Butterworth, Chebyshev, etc.).

Returns

A list of class 'FilterSpecs' with the following list elements (repeats of the input arguments):

• n: filter order
• Wc: cutoff frequency
• type: filter type, normally one of "low", "high", "stop", or "pass".
• ...: other filter description characteristics, possibly including Rp for dB of pass band ripple or Rs for dB of stop band ripple, depending on filter type (Butterworth, Chebyshev, etc.).

Examples

filt <- FilterSpecs(3, 0.1, "low")

See Also

filter, butter and buttord, cheby1 and cheb1ord, ellip and ellipord.

Author(s)

Tom Short, tshort@eprisolutions.com ,

renamed and adapted by Geert van Boxtel, gjmvanboxtel@gmail.com