MATLAB: How to plot a square wave centered around the Y-axis in MATLAB

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I want to plot a square wave centered around the Y-axis.

Best Answer

The following code sample plots a square wave with an amplitude of 1 between -0.5 to +0.5 and 0 else where.

t = -0.5:0.01:0.5;
y = square(2*pi*.25*t,100);
plot(t,y)
tl = -1:0.01:-0.5;
yl = square(0*pi*.25*tl,0);
tr = 0.5:0.01:1;
yr = square(0*pi*.25*tl,0);
tg = [tl t tr];
yg = [yl y yr];
plot(tg,yg)

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MATLAB: Generate square wave starting from 0

[zeroes(1,M), ones(1,N)] repeated as necessary .

MATLAB: Shade area between a curve and a vertical line and the x axis

Add these lines:

xa = linspace(0.14, 0.2, 25);                               % Define ‘x’ For ‘patch’

ya = normpdf(xa,.1,.02);                                    % Define ‘y’ For ‘patch’

patch([xa fliplr(xa)], [zeros(size(ya)) fliplr(ya)], 'r')

so the compllete revised code is now:

x = [0:.001:.2];
y = normpdf(x,.1,.02);
subplot(211)
plot(x,y,'linewidth',2);grid;box on;
hold on
YL = get(gca, 'ylim');
YR = YL(2) - YL(1);
YL = [YL(1) - 1000 * YR, YL(2) + 1000 * YR];
line([.14 .14], YL, 'YLimInclude', 'off', 'linewidth', 2, 'Color', ...
    'black','LineStyle','-.');
xa = linspace(0.14, 0.2, 25);                               % Define ‘x’ For ‘patch’
ya = normpdf(xa,.1,.02);                                    % Define ‘y’ For ‘patch’
patch([xa fliplr(xa)], [zeros(size(ya)) fliplr(ya)], 'r')
hold off

That should do what you want.

Best Answer

Related Solutions

MATLAB: Generate square wave starting from 0

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