# Why do I recieve error when doing sinc function

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Taylor Hayes on 25 Jan 2022
Commented: Jon on 25 Jan 2022
Im trying to plot the sinc function and im given my A and T however when i try to input the equation i get an error A = 1;
T = 1;
gf= AT sinc(fT);
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Taylor Hayes on 25 Jan 2022 Jon on 25 Jan 2022
If you want to plot the sinc value for a range of values then you need to pass it a vector of values.
So for example:
x = linspace(-10,10,1000); % defines a vector with a thousand equally spaced points between -10 and 10
y = sinc(x);
plot(x,y)
You will need to modify with your actual values and scaling constants
Jon on 25 Jan 2022
If you are still just trying to get the basics of using MATLAB I would suggest completing the MATLAB on-ramp https://www.mathworks.com/learn/tutorials/matlab-onramp.html

Yusuf Suer Erdem on 25 Jan 2022
Hi, try it this way. That is the way how it should be done. But I could not get the exact waveform. Maybe others could help.
t = linspace(-5,5);
f=1./t;
A=5;
y = A.*t.*sinc(f.*t);
plot(t,y)
grid