Warning: Using only the real component of complex data.

%¿por que me da este warning?

n=0:5:50;

x= exp(j*pi*n);

stem(x)

Answer 1

[Yongjian Feng]

j is the imaginary unit here, so x is complex. stem is not used to plot complex numbers, that is why only the real component is used.

Maybe you want to plot the real part and/or the imaginary part?

stem(real(x))

stem(imag(x))