"""
Short demo How to Display Grid Lines in MatPlotLib
(C) 2022 by Mathematical Software Inc.
http://www.mathematical-software.com/
"""
# Python Standard Library
import os
import sys
import time
# NumPy and MatPlotLib add on Python packages/modules
import numpy as np
import matplotlib.pyplot as plt
XRANGE = 5.0
CUBE_CONST = 1.5
ACCELERATION = 9.8
VELOCITY = -20.0
x = np.linspace(-XRANGE, XRANGE, 200)
y = CUBE_CONST*x**3 + 0.5*ACCELERATION*x**2 + VELOCITY*x
# simple MatPlotLib plot
f1 = plt.figure()
ax = plt.axes() # get plot axes
ax.set_facecolor('lightgray') # background color of plot
plt.plot(x, y, 'g-')
plt.title('Grid Lines in MatPlotLib DEMO')
plt.xlabel('X')
plt.ylabel(f'Y = {CUBE_CONST:.2f}*X3 + {0.5*ACCELERATION:.2f}*x**2' f' + {VELOCITY:.2f}*x)')
plt.grid(which='major', color='black')
plt.grid(which='minor', color='gray')
plt.minorticks_on() # need this to see the minor grid lines
plt.show(block=True)
f1.savefig('how_to_display_grid_lines_in_matplotlib.jpg',
dpi=300)
(C) 2022 by John F. McGowan, Ph.D.
About Me
John F. McGowan, Ph.D. solves problems using mathematics and mathematical software, including developing gesture recognition for touch devices, video compression and speech recognition technologies. He has extensive experience developing software in C, C++, MATLAB, Python, Visual Basic and many other programming languages. He has been a Visiting Scholar at HP Labs developing computer vision algorithms and software for mobile devices. He has worked as a contractor at NASA Ames Research Center involved in the research and development of image and video processing algorithms and technology. He has published articles on the origin and evolution of life, the exploration of Mars (anticipating the discovery of methane on Mars), and cheap access to space. He has a Ph.D. in physics from the University of Illinois at Urbana-Champaign and a B.S. in physics from the California Institute of Technology (Caltech).