Voyager 2 is a data exploration tool that blends manual and automated chart specification. Voyager 2 combines PoleStar, a traditional chart specification tool inspired by Tableau and Polaris (research project that led to the birth of Tableau), with two partial chart specification interfaces: (1) wildcards let users specify multiple charts in parallel,(2) related views suggest visualizations relevant to the currently specified chart. With Voyager 2, we aim to help analysts engage in both breadth-oriented exploration and depth-oriented question answering.
For more information about Voyager 2's design, please read our CHI paper and other related papers (1, 2, 3).
WARNING:
This repository now hosts the ongoing migration of Voyager 2 to a React/Redux application, which is not yet ready for general use. See below for older, more stable versions of the code.
Since this new version of Voyager is not ready for demo / usage yet, you can access the demo and older versions of Voyager built in AngularJS at the following URL.
- The Voyager 2 visualization tool, which blends manual and automated chart specification – demo at http://vega.github.io/voyager2 and source code at https://github.com/vega/voyager2
- The Voyager 1 visualization browser -- demo at http://vega.github.io/voyager and source code in the
vy1
branch of this repository.
For basic setup for local development or installation, we use yarn for package management. Installing dependencies can be done with:
yarn
Once the installation is complete, use yarn test
to run the included tests.
To build a deployable version of the code, run yarn build
.
Please see our contributing documentation for more info about setup and coding conventions if you are interested in contributing to this project.
There are 3 artifacts build using yarn build
:
- Stand alone version of voyager in
dist/
. This distribution can be hosted on a web server to deploy Voyager. - Compiled Javscript and
.d.js
declaration files for a subset of the Voyager source code inbuild/src/
. These declarations and sources can be included in other packages that use Voyager as a dependency. See voyager-server for an example. - Embeddable Voyager build in
build/
. See below for more details on embedding Voyager in other applications.
Voyager can be embedded in another web application. The following sections document how to use it.
Using npm or yarn? Add the following to your package.json then run npm install datavoyager
or yarn add datavoyager
.
If you want to use the latest development version, you may want to clone and link Voyager.
Instantiation
const libVoyager = require('voyager');
const container = document.getElementById("voyager-embed");
const config = undefined;
const data = undefined;
const voyagerInstance = libVoyager.CreateVoyager(container, config, data)
Initializing with data
const data: any = {
"values": [
{"fieldA": "A", "fieldB": 28}, {"fieldA": "B", "fieldB": 55}, {"fieldA": "C", "fieldB": 43},
{"fieldA": "D", "fieldB": 91}, {"fieldA": "E", "fieldB": 81}, {"fieldA": "F", "fieldB": 53},
{"fieldA": "G", "fieldB": 19}, {"fieldA": "H", "fieldB": 87}, {"fieldA": "I", "fieldB": 52}
]
};
const voyagerInstance = libVoyager.CreateVoyager(container, undefined, data)
Updating Data
const voyagerInstance = libVoyager.CreateVoyager(container, undefined, undefined)
const data: any = {
"values": [
{"fieldA": "A", "fieldB": 28}, {"fieldA": "B", "fieldB": 55}, {"fieldA": "C", "fieldB": 43},
{"fieldA": "D", "fieldB": 91}, {"fieldA": "E", "fieldB": 81}, {"fieldA": "F", "fieldB": 53},
{"fieldA": "G", "fieldB": 19}, {"fieldA": "H", "fieldB": 87}, {"fieldA": "I", "fieldB": 52}
]
};
voyagerInstance.updateData(data);
You currently also need to include the CSS. Note that this has not yet been optimized for embedding (it will take over the whole screen)
<link rel="stylesheet" type="text/css" href="./node_modules/voyager/lib/style.css">
The voyager module exposes 1 function.
/**
* Create an instance of the voyager application and return it.
*
* @param {Container} container css selector or HTMLElement that will be the parent
* element of the application
* @param {Object|undefined} config Optional: configuration options
* @param {Array|undefined} data Optional: data object. Can be a string or an array of objects.
*/
Please see src/lib-voyager.tsx
to see the exposed public methods.
Computationally expensive portions of the Voyager process can be configured to run on a server.
To get this running in a local development environment, first clone and install the dependencies of the voyager-server project.
In voyager-server directory, yarn start
will start the server running on port 3000
.
With voyager-server now running, we can start voyager in server mode by running:
yarn start:server
This will run Voyager in "server-mode" sending requests to voyager-server, which it expects, by default, to be at http://localhost:3000.
The server url is controlled by the SERVER
environment variable.
See voyager-server for more information on what portions of the functionality the server handles.