ProReveal - Progressive Visual Analytics with Safeguards

ProReveal is a proof-of-concept system to realize our new visual analytics concept, Progressive Visual Analaytics with Safeguards. Our concept aims to provide a means for managing the uncertainty of intermediate knowledge gathered from progressive data exploration. Specifically, our system allows people to leave PVA-Guards on their uncertain intermediate knowledge, so that it can be verified during or after the analysis. We implement seven low-level PVA-Guards—namely, Value', Rank, Range, Comparative, Power Law, Normal, and Linear. Our paper is under review for publication in IEEE TVCG. The paper and demo videos will be released after the review process.

How can I use ProReveal?

• If you are just interested in our interface, go to our demo page and proceed with the "Continue with a browser engine" option. You can explore a toy dataset and all computations will take place on the web browser.

• If you are seeking scalability, you can use a Python backend. Our backend employs pandas as a computation engine.

• If you are seeking better scalability, you can set the backend to use Apache Spark, a distributed in-memory computing engine designed for large-scale data processing. Go to the documentation.

Building and extending the client

If you want to build the ProReveal client by your own, please follow the instructions below.

1. Make sure that node and npm are installed. I am using node 10.16.1 and npm 6.13.3.

2. Clone this repository.

git clone https://github.com/proreveal/ProReveal.git
cd ProReveal

3. Install the dependencies.

npm install

4. (Optional) If you are using the Python backend, open src/environments/environment.ts and make the apiHost property point to your backend.

5. Run a dev server and navigate to http://localhost:4200/. The default port is 4200.

npm start 

6. (Optional) If you want to build a self-contained version of ProReveal, use the ng build command.
   Install Angular Cli and build the project.

npm install -g @angular/cli
ng build --prod

The output will be stored in dist/ProReveal. Note that the above command will use src/environments/environment.prod.ts instead of environment.ts in the same directory.