fp=1000;
N=2000;
A=2.1;
f0=7.5;
fa=0.4;
r=linspace(0,(N-1)/fp,N);
%x=A*sin(2*pi*f0*t+fa);
figure(1);
hold off
%suma
x=rand(1,N)-0.5+8*sin(2*pi*11*t);
plot(t,x);
%komentarz
%opis osi
xlabel('czas[s]')
ylabel('sygnal')
y=rand(1,N);
hold on;
plot(t,y,'r')
%gen tonow
z=chirp(t,11,2,317);
figure(2);
plot(t,z)