What's my error trying to plot
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Lauren Fuentes
am 30 Jun. 2020
Kommentiert: Lauren Fuentes
am 1 Jul. 2020
Fs = 100;
t = (1:100)/Fs;
s1 = sin(2*pi*t*5); s2=sin(2*pi*t*15); s3=sin(2*pi*t*30);
s = s1+s2+s3;
[b,a] = ellip(4,0.1,40,[10 20]*2/Fs);
[H,w] = freqz(b,a,512) and plot(w*Fs/(2*pi),abs(H));
sf = filter(b,a,s);
S = fft(s,512);
SF = fft(sf,512);
w = (0:255)/256*(Fs/2);
plot(w,abs([S(1:256)' SF(1:256)']))
2 Kommentare
Adam Danz
am 30 Jun. 2020
If you have a question about an error message, you need to include the full copy-pasted error message.
Akzeptierte Antwort
Gurpreet Singh
am 30 Jun. 2020
Hi Lauren,
This error is occurring because of line 6. There should be delimeter instead of "and".
It should be as follows.
Fs = 100;
t = (1:100)/Fs;
s1 = sin(2*pi*t*5); s2=sin(2*pi*t*15); s3=sin(2*pi*t*30);
s = s1+s2+s3;
[b,a] = ellip(4,0.1,40,[10 20]*2/Fs);
[H,w] = freqz(b,a,512) ; plot(w*Fs/(2*pi),abs(H));
sf = filter(b,a,s);
S = fft(s,512);
SF = fft(sf,512);
w = (0:255)/256*(Fs/2);
plot(w,abs([S(1:256)' SF(1:256)']))
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SC
am 30 Jun. 2020
is the error you are getting:
"Invalid expression. Check for missing multiplication operator,
missing or unbalanced delimiters, or other syntax error. To
construct matrices, use brackets instead of parentheses." ?
This maybe because of 'and' in your code at line:6
Try the following:
Fs = 100;
t = (1:100)/Fs;
s1 = sin(2*pi*t*5); s2=sin(2*pi*t*15); s3=sin(2*pi*t*30);
s = s1+s2+s3;
[b,a] = ellip(4,0.1,40,[10 20]*2/Fs);
[H,w] = freqz(b,a,512);
plot(w*Fs/(2*pi),abs(H));
sf = filter(b,a,s);
S = fft(s,512);
SF = fft(sf,512);
w = (0:255)/256*(Fs/2);
plot(w,abs([S(1:256)' SF(1:256)']))
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