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Building Data-Driven Applications with Danfo.js

You're reading from   Building Data-Driven Applications with Danfo.js A practical guide to data analysis and machine learning using JavaScript

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Product type Paperback
Published in Sep 2021
Publisher Packt
ISBN-13 9781801070850
Length 476 pages
Edition 1st Edition
Languages
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Authors (2):
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Stephen Oni Stephen Oni
Author Profile Icon Stephen Oni
Stephen Oni
Rising Odegua Rising Odegua
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Rising Odegua
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Table of Contents (18) Chapters Close

Preface 1. Section 1: The Basics
2. Chapter 1: An Overview of Modern JavaScript FREE CHAPTER 3. Section 2: Data Analysis and Manipulation with Danfo.js and Dnotebook
4. Chapter 2: Dnotebook - An Interactive Computing Environment for JavaScript 5. Chapter 3: Getting Started with Danfo.js 6. Chapter 4: Data Analysis, Wrangling, and Transformation 7. Chapter 5: Data Visualization with Plotly.js 8. Chapter 6: Data Visualization with Danfo.js 9. Chapter 7: Data Aggregation and Group Operations 10. Section 3: Building Data-Driven Applications
11. Chapter 8: Creating a No-Code Data Analysis/Handling System 12. Chapter 9: Basics of Machine Learning 13. Chapter 10: Introduction to TensorFlow.js 14. Chapter 11: Building a Recommendation System with Danfo.js and TensorFlow.js 15. Chapter 12: Building a Twitter Analysis Dashboard 16. Chapter 13: Appendix: Essential JavaScript Concepts 17. Other Books You May Enjoy

Creating histograms with Danfo.js

A histogram, as we explained earlier, is a representation of the spread of data. The hist function exposed by the plot namespace can be used to make histograms from DataFrames or Series, as we'll demonstrate in the following section.

Creating a histogram from a Series

In order to create a histogram from a Series, you can call the hist function on the Series, or if plotting on a DataFrame, you can subset the DataFrame with the column name, as shown in the following example:

var layout = {
   title: "Histogram on a Series data",
}
var config = { 
  layout 
} 
new_df["AAPL.Open"].plot(this_div()).hist(config)

Running the preceding code cell gives the following output:

Figure 6.16 – Histogram on Series data

Next, we'll make a histogram for more than one column in a DataFrame at a time.

Creating a histogram from multiple columns

If you want to make...

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