VAST challenge 2014: Mini-challenge 1

In this paper, we address the Mini Task I of Min-Challenge I, pluging in knowledge and some techniques of data mining and information visualization into our assignment. The background of Mini-Challenge I describes a virtual story of a famous gas company(GAStech), which had suffered employees missing during company celebration, asking for help to find out the suspicious criminals. As an analyst, our task is to use visual analytics to analyze the available data and develop responses to the questions. By using Matlab, Python and D3.js, we gave out a reasonable conclusion and proper answers to the questions.