# Is my matlab code for the sinc signal below correct.

4 views (last 30 days)
Afuaab Koohg on 5 Oct 2022
Commented: Afuaab Koohg on 6 Oct 2022
I want to create and plot the signal equation below in matlab. The Coefficients ak are uniformly distributed in [−1, 1]. c is a constant. Here is my code:
%************ Variable declaration******************
t = -20:0.1:20;
p = -10:1:10
data = 0;
signal = zeros(1,length(t)); %for spped allocations
c = 25 % constant
ak = -1 + 2*rand(1,21); % numbers in the interval (a,b) with the formula r = a + (b-a).*rand(N,1).
count = 1;
%********************************************************************************************
for i = t
for k = p
data = data + c*ak(k+11)*sinc(i-k);
end
signal(counter) = data;
counter = counter + 1;
end
plot(t,signal);

Torsten on 5 Oct 2022
Edited: Torsten on 5 Oct 2022
%************ Variable declaration******************
rng('default')
t = -20:0.1:20;
signal = zeros(1,length(t)); %for spped allocations
c = 25; % constant
ak = -1 + 2*rand(1,21); % numbers in the interval (a,b) with the formula r = a + (b-a).*rand(N,1).
%********************************************************************************************
for i = 1:length(t)
T = t(i);
data = 0;
for k = -10:1:10
data = data + ak(k+11)*sinc(T-k);
end
signal(i) = c*data;
end
plot(t,signal) Chunru on 5 Oct 2022
Edited: Chunru on 6 Oct 2022
%************ Variable declaration******************
t = -20:0.1:20;
p = -10:1:10;
signal = zeros(1,length(t)); %for spped allocations
c = 25; % constant
ak = -1 + 2*rand(1,21); % numbers in the interval (a,b) with the formula r = a + (b-a).*rand(N,1).
%********************************************************************************************
for i = 1:length(t)
data = 0;
for k = 1:length(p)
data = data + c*ak(k)*sinc(t(i)-p(k));
end
signal(i) = data;
end
plot(t,signal); Afuaab Koohg on 6 Oct 2022
Thanks so much @Torsten and @Chunru: I accept the solutions that you have provided.
Are you able to help my other question please?

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