I couldn't fix problem
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if true
eksi_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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Accepted Answer
per isakson
on 26 Oct 2013
Edited: per isakson
on 26 Oct 2013
In this line
filter=[zeros(1,3513) eksi_kisim arti_kisim zeros(1,3513)];
you make filter a double array. Because of that the function filter cannot be called. Surely, that was not your intention.
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