Multiple Plots in Spyder

[PythonAndMe2023]

Hello
I'm relatively new to Python and am not sure how to best display multiple plots in Spyder.
The code below always displays the last plot (each single one works - tested by putting the last one(s) in '''...'''). Can somebody please help me with this?

My Code:

# pip install control

import numpy as np
import control
import matplotlib.pyplot as plt
from control.matlab import *

#     4s+1
#   ---------
#   2s^2+5s-2
num = np.array([4, 1])
den = np.array([2, 5, -2])

# Transfer Function
H = control.tf(num, den)
print('H(s) =', H)

# Zeros
z = control.zero(H)
print('z =', z)

# Poles
p = control.pole(H)
print('p =', p)

# P-Z Map-------------------------------------- 1st plot
control.pzmap(H)

# Bode Plot------------------------------------ 2nd plot
mag, phase, omega = control.bode(H)

# Step Response-------------------------------- 3rd plot
t, y = control.step_response(H)
plt.plot(t, y)
plt.title("Step Response")
plt.grid()

# lsim------------------------------------------ 4th plot
t = np.arange(0, 20, 0.01)
w0 = 3
u = np.cos(w0*t)
yout, T, xout = lsim(H, u, t, X0=0.0)
plt.plot(t, yout)
plt.grid()
plt.show()

Larz60+ write Feb-04-2023, 10:28 PM:
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