if trueeksi_kisim=linspace(0,1,2000);arti_kisim=linspace(1,0,2000);filter=[zeros(1,3513) eksi_kisim arti_kisim zeros(1,3513)];channel_st= abs(shift_xx).*filter;filter_st=ifft(channel_st);figure;dt=filter_st.*cos(wc*t);plot(t,abs(dt));title('dt grafic');xlabel('time');ylabel('dt');axis([0 1 -5 15]);figure;tt=fft(dt);plot(abs(fftshift(tt)));title('dt spectrum grafic');xlabel('frequency');ylabel('dt');% filter code
[B,A]= butter(5,0.25);out=filter(B,A,dt);figure;plot(t,out);axis([0 1 0 8]); % code
end
out=filter(B,A,dt); in that line Subscript indices must either be real positive integers or logicals. this error come up
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