RL series impedance vs. frequency plot

I1 1 0 DC 0 AC 1
Rshunt 1 0 100MEG $ avoid singular matrix
R1 1 2 1
C1 2 3 1n
L1 3 0 10u

.control
ac dec 100 1k 1000MEG
plot vdb(1)
.endc

.end