demo6_matplotlib.py

# import modules
from matplotlib import pyplot as plt
from numpy import sin, cos

# create coordinates
x = [10,20,30,40,50]
y = [30,30,30,30,30]

# create plots with labels
plt.plot(x, y, 'r', label = "line 1", linestyle="-") 
plt.plot(y, x, 'g+', label = "line 2", linestyle="--")
plt.plot(x, sin(x), label = "sine curve", linestyle="-.") # (x - sin(x))
plt.plot(x, cos(x), label = "cosine curve", linestyle=":") # (x - cos(x))

# display graph
plt.tight_layout() # decrease graph's padding
plt.legend() # display line labels
plt.show()