make one part of a function repeat it self in diffrent sections of time line.

N = 10000;
t = linspace(-3*pi, 3*pi, N + 1)'; t(end) = [];
x = -t;
figure; hold on; grid on;
plot(t, x, 'b', 'LineWidth', 1)
legend('x(t)');
xlabel('t');
ylabel('x(t)');

this is my code and my input funciton is x=-t

i want the plot graph to repeat it self this way in intervals of 2*pi:

now,obviously the plot is just the function -t in the interval {-3pi,3pi} without repitations.

I cant find the right syntax to do it.

if someone has an idea , i could use the help. thanks

Answer 1

[Yotam Rotelman]

found the solution. these will create 3 iepitations.

%%1
N = 10000;
t = linspace(-pi, pi, N + 1)'; t(end) = [];
x = -t;
t1 = linspace(-3*pi, 3*pi, 3*N)';
X=[x;x;x];
figure; hold on; grid on;
plot(t1, X, 'b', 'LineWidth', 1)
legend('x(t)', 'y(t)');
xlabel('t');
ylabel('x(t)');

Answer 2

[Akira Agata]

If you have a Signal Processing Toolbox, you can simply use sawtooth function, like:

% Generate signal
t = linspace(-4*pi,4*pi,1000);
y = -1*pi*sawtooth(t-pi);

% Plot the waveform
figure
plot(t,y)