How to draw the delta signal in matlab

I was trying to draw but I wasn't able to

Answer 1

[the cyclist]

Do you mean the Dirac delta function? If so, then dirac might help you.

Also, if you do mean the Dirac delta, I hope you realize that it can't truly be "drawn", because it goes to infinity. It can be represented somehow (e.g. by drawing an arrow at the x location where the Delta is).

[Juman Saleh]

i know the function but how to plot d(t-1)

Answer 2

[Star Strider]

The function normally will not plot in MATLAB because it has infinite amplitude and infinitesimal width.

So it is necessary to approximate it in ordfer to plot it —

t = linspace(0, 2, 21);
Delta = dirac(t - 1)

Delta = 1×21

0 0 0 0 0 0 0 0 0 0 Inf 0 0 0 0 0 0 0 0 0 0

idx = Delta == Inf;
Delta(idx) = 1;

figure
stem(t, Delta, 'filled')
axis('padded')

.

Answer 3

[Carlos M. Velez S.]

If you want to apply the Dirac delta function in simulation to continuous-time systems, the following code is enough:

function y = delta_dirac(u)
[n,m] = size(u);
if max(n,m) ==1
    dt = 1e-6; % Define a small time increment for the delta function
else
    dt = u(2) - u(1);
end
y = zeros(n,m);
for i=1:max(m,n)
    if u(i) == 0
        y(i) = 1/dt;
    else
        y(i) = 0;
    end
end