import numpy  as np
import matplotlib.pyplot as plt

left = 0.2
bottom = 0.1
width = 0.7
height = 0.8

x = np.linspace(0, np.pi*4, 100)
y = np.cos(x) + np.sin(x)

fig = plt.figure()
ax = fig.add_axes([left, bottom, width, height])
ax.plot(x, y)