I want to create a square wave shows in the Picture

Hi All,

I would like to create a square wave as shown in the figure, which start at 1 ends at 0, has opposite polarity at same peroid. Frequency is 32 Hz and sample rate is 32768.

Answer 1

[Adam Danz]

Inputs:

• Define y as the step value at each step (row vector).
• Define dx as the x-interval (scalar).
• Define x0 as the starting x-coordinate (scalar).

% inputs
y = [1 0 -1 0];
dx = 1; 
x0 = 0;

% Create step function
x = x0 + cumsum(dx*ones(size(y)));
xr = [x(1),repelem(x(2:end),1,2)];       % X is row vec
yr = [repelem(y(1:end-1),1,2),y(end)];   % Y is row vec

% Plot results
plot(xr,yr)
axis padded
grid on

Answer 2

[Steven Lord]

Looking at the Plots tab of the Toolstrip, the thumbnail that looks closest to the picture that you posted is the stairs function. Take a look at the documentation page for that function and see if it suits your needs.