Inverting Axes of a Matplotlib Plot

Introduction

Inverting axes in a Matplotlib plot can be useful when visualizing data with a non-linear relationship. This lab will guide you through the process of inverting the axes of a plot using Matplotlib in Python.

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Import Required Libraries

The first step is to import the required libraries. In this lab, we will be using Matplotlib and NumPy. Matplotlib is a popular plotting library in Python, and NumPy is a library for scientific computing in Python.

import matplotlib.pyplot as plt
import numpy as np

Create Data

Next, we need to create some data to plot. In this example, we will create an array of values for time (t) and an array of values for voltage (s).

t = np.arange(0.01, 5.0, 0.01)
s = np.exp(-t)

Create the Plot

Now, we can create the plot using Matplotlib. We will use the plot function to plot our data and set the limits of the x-axis using the set_xlim function.

fig, ax = plt.subplots()

ax.plot(t, s)
ax.set_xlim(5, 0)  ## decreasing time
ax.set_xlabel('decreasing time (s)')
ax.set_ylabel('voltage (mV)')
ax.set_title('Should be growing...')
ax.grid(True)

plt.show()

Invert the Axes

To invert the x-axis, we simply need to reverse the order of the limits using the set_xlim function. In this example, we set the x-axis limits from 5 to 0, which effectively reverses the x-axis.

ax.set_xlim(5, 0)  ## decreasing time

View the Inverted Plot

Finally, we can view the inverted plot using the show function.

plt.show()

Summary

Inverting the axes of a Matplotlib plot can be useful when visualizing data with a non-linear relationship. This lab provided a step-by-step guide on how to invert the x-axis of a plot using Matplotlib in Python. By reversing the order of the x-axis limits, we can effectively invert the x-axis of our plot.