How to use heatmap function in seaborn

share link

by dot icon Updated: Sep 6, 2023

technology logo
technology logo

Solution Kit Solution Kit  

Seaborn library is a Python data visualization library built on top of Matplotlib. It offers a high-level interface to build informative and attractive statistical graphics.  


One of the popular visualizations it offers is the heatmap function. A heatmap shows data using colors to represent individual values within a matrix. When you put numbers in a table, it's easier to see how they relate and form patterns.  


Heatmaps show data as colors by visualizing matrices with individual values. Seaborn's heatmap () function is particularly useful for creating heatmap plots. Heatmaps can visualize some types of data. 

  • Correlation Matrices: Visualizing relationships between variables by displaying correlation coefficients as heatmap colors.  
  • Confusion Matrices: Representing the performance of classification models.  
  • Hierarchical Clustering: Displaying the results of clustering algorithms in the data values.  


Here are some of the commonly used Seaborn plot types that you can create using Seaborn Python:   

  • Bar Plots (barplot() and countplot())   
  • Point Plots (pointplot())   
  • Box Plots (boxplot ())   
  • Violin Plots (violin plot ())  
  • Histograms   


In conclusion, Seaborn is a powerful data analysis tool due to its unique features. It's ability to integrate with Panda's library and Matplotlib and its functions. It empowers data analysts and scientists to extract valuable from their datasets.  

Fig: Preview of the output that you will get on running this code from your IDE


In this solution we are using seaborn library


Follow the steps carefully to get the output easily.

  1. Download and Install the PyCharm Community Edition on your computer.
  2. Open the terminal and install the required libraries with the following commands.
  3. Install seaborn - pip install seaborn
  4. Create a new Python file on your IDE.
  5. Copy the snippet using the 'copy' button and paste it into your python file.
  6. Run the current file to generate the output.

I hope you found this useful.

I found this code snippet by searching for ' Seaborn Heatmap with single column ' in Kandi. You can try any such use case!

Environment tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. PyCharm Community Edition 2023.1
  2. The solution is created in Python 3.11.1 Version
  3. Seaborn 1.0.7 Version

Using this solution, we can able to use heatmap method in seaborn with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to use heatmap method in seaborn.

Dependency library

seabornby mwaskom

Python doticonstar image 10797 doticonVersion:v0.12.2doticon
License: Permissive (BSD-3-Clause)

Statistical data visualization in Python


            seabornby mwaskom

            Python doticon star image 10797 doticonVersion:v0.12.2doticon License: Permissive (BSD-3-Clause)

            Statistical data visualization in Python

                      You can search for any dependent library on kandi like ' Seaborn '.


                      1. What is the size of a Seaborn Heatmap?  

                      The size of a Seaborn heatmap can change depending on how it's displayed in a plot. When you create a heatmap using Seaborn's heatmap() function. To set the size of the figure, use the figsize parameter. It needs a tuple with width and height in inches.  


                      2. Can Seaborn-Python help with making heatmaps in data visualization?  

                      Seaborn, a data visualization library, simplifies heat maps by abstracting plot complexities. It provides a high-level interface tailored for creating various types of visualizations. Here's how Seaborn helps with creating heatmaps:  

                      • Abstraction of Plotting Details  
                      • Pre-Defined Color Palettes  
                      • Simple Syntax  
                      • Data Integration  


                      3. How can I create a Heatmap using a Python Numpy array?  

                      You can create a heatmap using a Python NumPy array by utilizing the Seaborn library. You can use Seaborn's heatmap() function to create beautiful heatmaps using NumPy arrays. Here's a step-by-step guide to creating a heatmap using a NumPy array:  

                      • Import Libraries: You can start by importing the required libraries, NumPy and Seaborn. You'll also need Matplotlib to display the heatmap.  
                      • Create a NumPy Array: Define your data as a NumPy array.   
                      • Create the Heatmap: Use Seaborn's heatmap() function to create the heatmap. Pass your NumPy array as the data argument.  
                      • Customization  


                      4. Can you show me how to make good-looking heatmaps using the Pandas library?  

                      The Pandas library, in conjunction, can enhance the process of generating visualizations. Pandas allow you to manipulate your data before creating the heatmap. Which can lead to more informative visualizations. Here's how you can use Pandas to generate meaningful visualizations with your heatmaps:  

                      • Import Libraries  
                      • Load or Prepare Data with Pandas  
                      • Data Preprocessing  
                      • Create the Heatmap with Seaborn  
                      • Enhance with Pandas Labels and Annotations  


                      5. How can divergent data be accurately represented in a seaborn heatmap?  

                      To choose the right colors, pick a palette and put it in the middle of the data range. This ensures both positive and negative values. Distinct colors visualize values while emphasizing divergence. Here's how you can accurately represent divergent data in a Seaborn heatmap:  

                      • Choose a Divergent Color Palette  
                      • Center the Colormap  
                      • Set a Midpoint Color  


                      1. For any support on kandi solution kits, please use the chat
                      2. For further learning resources, visit the Open Weaver Community learning page

                      See similar Kits and Libraries