generating/plotting aperiodic functions

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Sarah
Sarah 2011-11-10
Hey guyssss,
Can someone explain to me how I can define an aperiodic square function in MATLAB? This is the code I have for time:
TimeStep = 0.0001*2*pi; %time increment
Time.Start = 0; %time interval starting time
Time.End = 10*2*pi; %time interval ending time
Time = Time.Start:TimeStep:Time.End;
I want to be able to change the width and amplitude of the function. Any help would be greatly appreciated :)

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回答（1 个）

Fangjun Jiang
Fangjun Jiang 2011-11-11
f below will be your function.
f=@(t,StartTime,EndTime,Amplitude) Amplitude*and(StartTime<t,t<EndTime);
To test it out:
t=-1:0.1:5;
y=f(t,0.3,3.6,1.3);
plot(t,y);grid on;
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Sarah
Sarah 2011-11-11
It can be anywhere within the duration of the sinusoidal signal. I can change those parameters later, i just want the square to occur within the time duration of the signal.
Fangjun Jiang
Fangjun Jiang 2011-11-11
In the f() defined in my code, the StartTime and EndTime refer to the start/end time of the square. You can put the start/end time of your signal in the time vector.
t=(0:0.0001:10)*2*pi;
y=f(t,30,50,1.3);

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