Asked by ADNAN KIRAL
on 2 Sep 2019

hi how can i get this figure ?

i have used the following eq.

by coding the following type;

but it did not work can u please help me with that ? i cannot get negative values. thanks.

t=-511*0.005:0.01:512*0.005;

u_1=3/2*(110*sinc(110*pi*t)-60*sinc(60*pi*t));

Answer by KALYAN ACHARJYA
on 2 Sep 2019

Edited by KALYAN ACHARJYA
on 2 Sep 2019

Accepted Answer

t=-linspace(-511*0.005,512*0.005,1000)

u_t=3*(sin(2*55*pi*t)-sin(2*30*pi*t))./(2*pi*t);

plot(u_t);

KALYAN ACHARJYA
on 2 Sep 2019

Now this one sir?

t=-linspace(-511*0.005,512*0.005,1000)

u_t=3*((2*55*pi*t).*sinc(2*55*t)-(2*30*pi*t).*sinc(2*30*t))./(2*pi*t);

plot(t,u_t);

Torsten
on 2 Sep 2019

This doesn't help since you still divide by 0 at t=0.

If you divide out, you get what I wrote in my answer.

KALYAN ACHARJYA
on 2 Sep 2019

@Torsten OK sir, thanks for rectifying me. I will update it.

Gratitude!

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## 2 Comments

## Dimitris Kalogiros (view profile)

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https://au.mathworks.com/matlabcentral/answers/478539-question-about-sinc-function#comment_741288

## ADNAN KIRAL (view profile)

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https://au.mathworks.com/matlabcentral/answers/478539-question-about-sinc-function#comment_741331

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