semi-log scaled plot
hdl = semilogy(X,Y)
1 by n or m by n matrix
Handle of the created Polyline entity
SEMILOGY(...) is the same as PLOT(...), except a logarithmic (base 10) scale is used for the Y-axis.
w=logspace(-2,2,200); s=%i*w; g=1../(s.^2+0.01*s+1); semilogy(w,abs(g));