Category Archives: Data Visualization

Data Analysis Using Zeppelin on Windows

We know that Apache Zeppelin is a web-based multipurpose note book. It provides an interactive Data Analysis and many more. such as Data Ingestion, Data Discovery, Data Visualization & Collaboration. In this post I will explore some basic data analysis using Zeppelin and Spark.

To enable Apache Spark and Zeppelin on Windows system you need to download and install the Sparklet on your windows system.

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Data Visualization using Zeppelin on Windows

It’s been a couple of weeks that we have released Sparklet beta version, the Apache Spark and Zeppelin installer for windows standalone. As I was playing around with data visualization, I thought to write a blog post on it. So here  are the steps to create a basic chart which are included in Zeppelin.

To run Spark and Zeppelin you need to download and install the Sparklet on your windows system. Go through the Zeppelin’s Display system to learn more about display charts.

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Visualizing web page views using D3js

In this post I am going to show you a Data Visualization using web page view data which is the number of web page views in every month for the year 2014. I have downloaded the data in a csv format and after a bit of cleansing the data file, it looks as below.

"MonthName","PageViews"
"Jan","1646"
"Feb","1143"
"Mar","1643"
"Apr","1591"
"May","1645"
"Jun","2082"
"Jul","2633"
"Aug","3035"
"Sep","2882"
"Oct","2900"
"Nov","2780"
"Dec","2448"

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How domain and range works in D3js

When you are working with Scale functions in D3, there you need a domain and range to map the data values from an input domain to an output range, which means range of possible input data values to range of possible output values.

Below is the basic example to understand the domain and range.

Suppose you have a dataset like [100, 200, 300, 400, 500, 600] and you need to visualize each data to width of one bar into a canvas of 500px width and height. Code will look like as below.

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A brief introduction to D3js Data Visualization

D3.js is a JavaScript library which helps you to create amazing data visualization using HTML, SVG and CSS by leveraging existing web standards and it supports and gives full access to all modern browsers as well as that of Android and iOS. D3 refers to Data-Driven Documents. Today it is a most popular web based data visualization technology in the world.

Since last couple of weeks I am learning D3, so you can say I am a beginner to the D3. Here I am going to show you a very basic Data Visualization example.

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