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From: | Ron Crummett |
Subject: | Re: Shifting signal down |
Date: | Thu, 27 Oct 2011 14:15:40 -0700 |
Greetings allI have a signal that is created from 0 to 1 for the square,rectangle and the sawtooth signals on the y axis how can I shift the signal down (vertical offset) so the signal will go from -0.5 to 0.5 on the y axis, and change the triangle signal from 0.5 to 1.0 to -0.5 to 0.5?clear all
% SCRIPT BEGINS
t=linspace(0,1,22050)
freq=5%how many times it repeats in 1 sec
A = 1; % amplitude
T = 1/freq; % period of the signal
% square
square = mod(t * A / T, A) > A / 2;
plot(t, square)
title('Square');
% rectangle
l = 0.2; % percentage the signal spends on low value
rectangle = mod(t * A / T, A) > A * l;
figure;
plot(t, rectangle);
title('Rectangle');
% sawtooth
sawtooth = mod(t * A / T, A);
figure;
plot(t, sawtooth);
title('Sawtooth');
% triangle
triangle = (mod(t * A / T, A) > 0.5).*mod(t * A / T, A) + (mod(t * A / T, A) <= 0.5).*(1 - mod(t * A / T, A));
figure;
plot(t, triangle);
title('triangle');
thanks
--
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