matplotlib learning 2- common graphics - a line chart

import matplotlib
import matplotlib.pyplot as plt # Import module pyplot
import numpy as np
 
# Data for plotting
t = np.arange (0.0, 2.0, 0.01) #numpy construct an array, between 0 and 2, in steps of 0.01
s = 1 + np.sin (2 * np.pi * t) #numpy calculated
 
fig, ax = plt.subplots () # subplots set the canvas
ax.plot(t, s)
 
ax.set(xlabel='time (s)', ylabel='voltage (mV)',
       title = 'About as simple as it gets, folks') # Set FIG title, x and y axis name
ax.grid () # grid is set, the default grid has to be provided in accordance with the following linear, color and width
#ax.grid(True, linestyle = "-.", color = "r", linewidth = "1") 
fig.savefig ( "test.png") # save image
plt.show()