About me

Interactive data exploration using Dc.js

⏳ 1 mins read time ❀️ Views

Interactive visualizations are a great alternative to static figures for data analysis. The reader is able to define his own story by making its own explorations and get its own conclusions. In this post I show a simple way to get interactive visualization using javascript functions dc.js.

The code can be found at the following gist and the visualization is available at this link. The visualization have to main files:

  • index.html that contains the front end of the visualization
  • graph.js that contains all javascript that runs the interactive components


I used bulma.io css framework to set the differents charts in a responsive way. This framework provides a tiles disposition to create a grid of content.

The structure of the grid in terms of bulma instructions is the following:

tile is-ancestor
β”œβ”€β”€β”€tile is-vertical is-8
|   |
|   β”œβ”€β”€β”€tile
|   |   |
|   |   β”œβ”€β”€β”€tile is-parent is-vertical
|   |   |   β”œβ”€β”€β”€tile is-child
|   |   |   └───tile is-child
|   |   |
|   |   └───tile is-parent
|   |       └───tile is-child
|   |
|   └───tile is-parent
|       └───tile is-child
    β”œβ”€β”€β”€tile is-parent
    |   └───tile is-child
    └───tile is-parent
        └───tile is-child


The div elements that are inside the tiles are created using the graph.js file. This file uses d3.queue to load the json file ./df.json using d3.json function and wait until it finish to execute the function makeGraphs.

The function makeGraphs:

  • Parses date time data
  • Creates a crossfilter and add the records. A filter represents a multidimensional dataset.
  • Definition of the dimension of the crossfilter.
  • Groups data on each dimension.
  • Define the charts and the id to be used in the html file.
  • Update the heatmap if any dc chart get filtered

The barplots are made using standard dc.js api. They are connected through crossfilter.js so when each dimension each filter, the results can be see in the other dimensions. In addition, the Leaflet map is connected to the charts so when one chart is filtered, the results are shown in the heatmap.


The final interactive visualization is available in this block link

In relation with 🏷️ d3.js, dc.js, bulma, leaflet:

Interactive dashboard using Google Analytics, Github Actions and Dc.js

This article shows how to use google analytics api to build a customized dashboard using javascript library dc.js and deploy them using Github Actions

Muse: Mopidy web client with Snapcast support

Services like Mopidy and Snapcast are ideal to create a multiroom streaming audio player using devices like the RaspberryPi or android telephones. This posts presents a web interface that uses the state of the art web technologies and integrates nicely with Mopidy and Snapcast.

Search posts functionality in AMP static website make with Jekyll

Good web reference is related with how fast your web page loads. Google works in a web format called AMP, which makes loading pages faster but also imposes some restrictions, like no external javascript. It's not simple to add API calls in AMP so this post shows how to implement a search fonctionality in a static page.

Algolia search engine in Jekyll static pages

This article shows how to implementent Algolia searching engine in a static website and update the entries using Github Actions.

Subscribe to my newsletter πŸ“°

and share it with your friends: