Plotting Discrete Time Functions
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I need to plot 5 cos(π n /6 - π/2) as a discrete tim signal. But I am not getting the proper result.
n = [-5:0.001:5];
y = 5*cos(pi*(n/2)-(pi/2));
stem(n,y);
What am I missing from this code to get the discrete time signals?
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回答 (2 件)
Austin Holmes
2021 年 11 月 11 日
The original poster asked for the discrete time signal not the continuous time signal. A discrete time signal just means sampling your continuous signal at discrete time intervals.
The simplest way this can be done is by increasing your step in n.
n = [-5:0.25:5];
y = 5*cos(pi*(n/2)-(pi/2));
stem(n,y);
The proper way to do this would be determining a sampling rate and implementing it in your code.
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Freedom TSOKPO
2020 年 9 月 23 日
I've just began with Matlab and I don't even know the function stem.
But I think this code can do it
clear all; clc;
n = -5:0.001:5;
y = 5*cos((n-1)*pi/2); %5*cos(pi*(n/2)-(pi/2));
figure
% axis([-6 6 -4 4]);
plot(n,y);
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