How do I make this square wave graph?

I don't know how to make the cycle repeat itself.

Answer 1

[Adam Danz]

Set the parameters at the top.

% Parameters
period = 2*pi;      % Period
xrange = [0, 6*pi]; % [start,end] x values
amplitude = 2;      % peak-trough amplitude
verticalShift = 0;  % Vertical shift, negative shifts downward
phaseShift = 0;     % Phase shift, negative shifts rightward

% create step fcn 
th = linspace(xrange(1), xrange(2), 1000);
y = amplitude*(sin(2*pi/period*th+phaseShift)>0)-amplitude/2+verticalShift; 

% Plot it
plot(th, y)
ylim([-2,2])
grid on