?? stat0315_1.m
字號:
clear
clc
A = 10;
A2 = 5;
f = 2;
f2 = 3;
t = 0:0.01:30;
fp = 100;
%dt = (t(2)-t(1))
df = 1/ max(t);
ff = 0:df:max(t)*df;
nr = f/df;
x = A * sin(2*pi*f*t) + A2 * sin(2*pi*f2*t);
plot(t, x);
pause
X = abs(fft(x));
freq=(0:1:4*nr)*df;
X = X/(length(X)/2);
plot(freq, X(1:length(freq)));
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