What's my error trying to plot

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)']))

[Adam Danz]

If you have a question about an error message, you need to include the full copy-pasted error message.

[Lauren Fuentes]

Thanks for the clarification, I'll make sure to do so next time around...

Answer 1

[Gurpreet Singh]

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)']))

Answer 2

[SC]

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)']))

[Lauren Fuentes]

Thank you so much!