I have to design a lowpass filter with passband of 0-1000Hz and sampling rate of 10kHz when i implement using fdatool it works but when I use this piece of code there is an error saying 'Value must be strictly positive'. Here is the code please correct me
d = fdesign.lowpass('Fp,Fst,Ap,Ast',0,1000,1,80,10000); Hd1 = design(d,'equiripple'); t = 0:1e-4:1; x = cos(2*pi*500*t)+0.5*cos(2*pi*1000*t);out = filter(Hd1,x);
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