Problem in plotting periodic waves

Hello, I want to plot simple one period ( square wave whose duty cycle is 25% )that's it with the help of simple for and if statements but its so annoyingly hard in MATLAB. please help me, i shall be grateful. This is my code. WHen i run it i cannot get anything. Yes i am trying and i am relatively new to MATLAB so this matrices thing is so confusing.Thank you.

T=1;

Tp = 0.25;

one = [1 1 1 1 1];

zero = [0 0 0 0 0 ];

x = 0:0.1:0.25;

t=0;

for t= 0:0.25:1

if t < 0.50

     A = one;
else
    A = zero;   
end

end plot (t,A)

Answer 1

[Star Strider]

The Signal Processing Toolbox has the pulstran (link) funciton.

Otherwise, try this:

p = 20;                                                                             % Period
d = 0.25;                                                                           % Duty Cycle

sqwv = @(p,d) [ones(1,ceil(p*d))  zeros(1,p-ceil(p*d))] .* ((d > 0) & (d < 1));     % Square Wave Anonymous Function
pulsetrain = @(n) repmat(sqwv(p,d), 1, n);                                          % Create Pulse Train Of ‘n’ Periods

pt = pulsetrain(5);                                                                 % Pulse Train
t = 1:length(pt);                                                                   % Time Vector

figure(1)
plot(t, pt)
set(gca, 'YLim',[-0.1 1.1])
grid

[Hani Syed]

But your period is of 20 and x axis is streched to 100. I want my period to be 1 with duty cycle of .25 and 5 periods .

[Star Strider]

I don’t see that requirement anywhere in your original Question.

It’s straightforward to adapt my code to do that:

p = 20;                                                                             % Period
d = 0.25;                                                                           % Duty Cycle

sqwv = @(p,d) [ones(1,ceil(p*d))  zeros(1,p-ceil(p*d))] .* ((d > 0) & (d < 1));     % Square Wave Anonymous Function
pulsetrain = @(n) repmat(sqwv(p,d), 1, n);                                          % Create Pulse Train Of ‘n’ Periods

pt = pulsetrain(5);                                                                 % Pulse Train
t = linspace(0, 5, length(pt));                                                     % Time Vector

figure(1)
plot(t, pt)
set(gca, 'YLim',[-0.1 1.1])
grid