Examples
-Wp = 40/500 -Ws = 150/500 -[n, Wn] = buttord(Wp, Ws, 3, 60) -n = 5 -Wn = 0.080038 |  |  |
/This function computes the minimum filter order of a Butterworth filter with the desired response characteristics.
n = buttord(Wp, Ws, Rp, Rs) -[n, Wc] = buttord(Wp, Ws, Rp, Rs)
scalar or vector of length 2
scalar or vector of length 2, elements must be in the range [0,1]
real or complex value
real or complex value
This is an Octave function. -This function computes the minimum filter order of a Butterworth filter with the desired response characteristics. -The filter frequency band edges are specified by the passband frequency wp and stopband frequency ws. -Frequencies are normalized to the Nyquist frequency in the range [0,1]. -Rp is measured in decibels and is the allowable passband ripple, and Rs is also in decibels and is the minimum attenuation in the stop band. -If ws>wp, the filter is a low pass filter. If wp>ws, the filter is a high pass filter. -If wp and ws are vectors of length 2, then the passband interval is defined by wp the stopband interval is defined by ws. -If wp is contained within the lower and upper limits of ws, the filter is a band-pass filter. If ws is contained within the lower and upper limits of wp the filter is a band-stop or band-reject filter.
Wp = 40/500 -Ws = 150/500 -[n, Wn] = buttord(Wp, Ws, 3, 60) -n = 5 -Wn = 0.080038 | | |