zao.m

一个能离散FFT的MATLAB综合运用题,做的不好

N=get(handles.edit1,'string');
 n=[0:N-1];
 T=get(handles.edit2,'string');
 T=str2num(char(T));
 t=n*T;
x=sin(1.5*pi*t)+0.5*cos(3*pi*t);
y=x+2*randn(size(t));
plot(1000*t(1:50),y(1:50));
grid ;
title('signal corrupted with zero-mean random noise');
xlabel('time (milliseconds)');