# Matplotlib Tutorial: Drawing Grid Lines Behind Graph Elements

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If you’re looking for a way to make your graph presentations more professional-looking and cleaner, then this tutorial on drawing grid lines behind graph elements using Matplotlib is exactly what you need.

With this tutorial, you’ll learn how to create stunning visualizations that will impress your audiences with just a few simple tweaks in Matplotlib. The best part is, you don’t even have to be an expert in data visualization or programming to follow along!

Whether you’re a beginner or a pro, this step-by-step guide will show you how to draw grid lines behind graph elements, making your graphs easier to read and interpret. You’ll also learn how to customize your grid lines to complement your presentation’s color scheme and style.

So if you’re ready to transform your graphs into professional-quality presentations, grab your copy of this tutorial now and get ready to take your data visualization game to the next level!

“Matplotlib: Draw Grid Lines Behind Other Graph Elements” ~ bbaz

## Introduction

Matplotlib is an open-source library in Python that provides a wide variety of tools for data visualization. In addition to graphs and charts, the library also lets you add gridlines for better readability. However, sometimes the default placement and style of these grid lines can interfere with the visibility of important graph elements. This tutorial highlights a step-by-step guide on how to draw grid lines behind graph elements using Matplotlib.

## Why Draw Grid Lines Behind Graph Elements?

In many cases, the grid lines in a graph are as important as the graph itself. They help readers to visualize the data and understand relationships between values. However, by default, Matplotlib draws these grid lines on top of graph elements, such as lines, markers, and pointsmaking it difficult to see the relationship between the graph elements and the grid lines.

## How to Draw Grid Lines Behind Graph Elements

1. Create a Figure and an Axis object.
2. Choose a style and color for the axes (line width).
3. Create the plot.
4. Set the zorder of the plot elements.
5. Draw vertical and horizontal grid lines behind the plot.
6. Set the zorder of the grid lines behind the plot.
8. Save the plot.

The following sections will go into more detail about each step.

### Create a Figure and an Axis Object

A Figure object is essentially a container that holds all the plot elements. An Axis object is what you actually plot data on. You can create both objects by calling the `subplots()` function.

To create a Figure and an Axis object:

`import matplotlib.pyplot as pltfig, ax = plt.subplots()`

### Choose a Style and Color for the Axes

If you want to change the color of the axes or make them thicker, you can use the `set_axis_bgcolor()` function to set a background color for the axis. You can also adjust the line width by setting the `linewidth` argument.

To choose a style and color for the axes:

`ax.set_axis_bgcolor('#f5f5f5')ax.spines['bottom'].set_linewidth(2)ax.spines['left'].set_linewidth(2)`

### Create the Plot

With your Figure and Axis objects in place, you can now create your plot by calling the appropriate plotting functions. In this example, we’ll create a simple line plot.

To create the plot:

`x_values = [1,2,3,4,5]y_values = [1,4,9,16,25]ax.plot(x_values, y_values, color='blue', linewidth=2)`

### Set the Zorder of the Plot Elements

Now that you have a plot, you need to set the zorder of each element so that the grid lines draw behind the plot elements. By default, Matplotlib draws grid lines with a zorder of 2, but you can set the zorder to 1 to draw them behind the plot.

To set the zorder of the plot elements:

`ax.lines[0].set_zorder(2)`

### Draw Vertical and Horizontal Grid Lines Behind the Plot

With the zorder of the plot elements set correctly, you can now add grid lines to the plot. You can draw vertical and horizontal grid lines by calling the `axvline()` and `axhline()` functions, respectively.

To draw vertical and horizontal grid lines:

`for i in range(1, len(x_values)):    ax.axvline(i, color='gray', linewidth=0.5, linestyle='--', zorder=1)    for i in range(1, max(y_values)):    ax.axhline(i, color='gray', linewidth=0.5, linestyle='--', zorder=1)`

### Set the Zorder of the Grid Lines

Finally, you need to adjust the zorder of the grid lines so that they appear behind the plot elements. You can set the zorder of the grid lines to -1 to make sure they always draw behind the plot.

To set the zorder of the grid lines:

`ax.xaxis.grid(zorder=-1)ax.yaxis.grid(zorder=-1)`

Once you have your plot looking how you want it, you can add legends and labels by calling the appropriate functions.

`ax.set_xlabel('X Values')ax.set_ylabel('Y Values')ax.set_title('Sample Line Plot')leg = ax.legend(['Y Values'], loc='upper left')`

### Save the Plot

Finally, you can save your plot as a file or display it on screen using the `savefig()` function.

To save the plot:

`plt.savefig('line_plot.png')`

## Comparison Table

Default Grid Lines Grid Lines Behind Plot Elements
Drawn on top of plot elements which can interfere with visibility Drawn behind plot elements to improve the readability of the graph
Zorder of grid lines = 2, set by default Zorder of grid lines = -1, drawn behind the plot

## Conclusion

Drawing grid lines behind graph elements is an effective way to enhance the readability of your graphs. By following the above step-by-step guide, you’ll be able to create professional-looking graphs in Matplotlib that will present your data in the clearest possible way. This technique is useful for anyone who needs to present data visually, such as researchers, journalists, and data analysts. Therefore, utilizing Matplotlib is highly recommended for proffesional data visualization purpose.

Thank you for visiting our blog and taking the time to read our tutorial on how to draw grid lines behind graph elements without a title using Matplotlib. We hope that this tutorial was informative, helpful, and insightful.

Matplotlib is a powerful data visualization library in Python, which provides a comprehensive range of tools and techniques for creating high-quality graphs and plots. Grid lines are an essential aspect of plotting and are used to enhance the visual appeal of a graph.

In this tutorial, we demonstrated how to draw grid lines behind graph elements without a title using Matplotlib. We started by importing the required libraries and data, followed by setting up the plot and grid lines. Next, we drew the graph elements and specified their properties, such as color, line width, and style. Then, we turned off the grid and drew the legend as the final step.

We hope that this tutorial has helped you learn how to draw grid lines behind graph elements without a title in Matplotlib. This technique is useful for enhancing the visual appeal of your plots and making them more intuitive and informative. Stay tuned for more exciting tutorials and articles on Matplotlib and data visualization!

People Also Ask about Matplotlib Tutorial: Drawing Grid Lines Behind Graph Elements:

1. What is Matplotlib?
2. Matplotlib is a data visualization library used for creating static, animated, and interactive visualizations in Python. It is one of the most widely used data visualization tools in the Python ecosystem.

3. What are grid lines in Matplotlib?
4. Grid lines in Matplotlib are horizontal and vertical lines that help to visualize the position of the data points on a graph. They can be used to make the graph more readable and informative.

5. How do I draw grid lines behind graph elements in Matplotlib?
6. You can draw grid lines behind graph elements in Matplotlib by using the `set_axisbelow()` method. This method sets the zorder of the grid lines to a lower value than the other graph elements, causing them to appear behind the other elements.

7. What are the benefits of drawing grid lines behind graph elements in Matplotlib?
8. Drawing grid lines behind graph elements in Matplotlib can make the graph more visually appealing and easier to read. It can also prevent the grid lines from obscuring important data points or labels.

9. Are there any downsides to drawing grid lines behind graph elements in Matplotlib?
10. One potential downside of drawing grid lines behind graph elements in Matplotlib is that it may make the graph harder to interpret for some viewers. Additionally, it may not be suitable for all types of data visualizations or data sets.