Discrete-time, scalar filter
Hd = dfilt.scalar(g)
Hd = dfilt.scalar
Create a direct-form I filter and a scalar object with a gain of 3 and cascade them together.
b = [0.3 0.6 0.3]; a = [1 0 0.2]; Hd_filt = dfilt.df1(b,a); Hd_gain = dfilt.scalar(3); Hd_cascade = cascade(Hd_gain,Hd_filt); hfvt = fvtool(Hd_filt,Hd_gain,Hd_cascade); legend(hfvt,'Original Filter','Gain','Cascaded Filter',... 'location','southwest');
To view the stages of the cascaded filter, use