N=100;
t=0:N-1;
w=randn(size(t));
[up,lo] = envelope(w,size(t),'rms');
plot(t,up,t,lo,'linewidth',1.5)
legend('q','up','lo')
dostaję error
invalid use of script /home/oo/envelope.m in index expression
error: called from my_envelope.m at line 4 column 8