given a time axis:t=lin​space(0,10​,512); and a signal x=3sin(5t)-6cos(9t). how do i add random noise n to obtain a noisy signal y=x+n. help me write a mathlab expression for random noise that will match my time axis. thanks

mathlb use in digital filtering.

[John D'Errico]

It is MATLAB. And read the help for randn.

Answer 1

[Rick Rosson]

n = randn(size(t));