Chronological Data
Robert Jeansoulin · 2018
This chapter presents an example which is a characteristic of many sites that provide access to chronological data, generally under CSV and JavaScript Object Notation (JSON) formats. Quandl.com is a data warehouse which basically sells financial data. Chronological data that are delivered as JSON can be directly received as JavaScript objects. Knowing that structure and the components of the URL, we are able to write a callback function and call the helperGetJson function with the correct arguments. Some of the graphic tools that propose to handle graphical data under different classical forms: line-chart, pie-chart, Gantt-chart, and so on. The chapter explores how to use the library dygraph.js for plotting several chronological data relative to the same abscissa axis and animating chronological data against time. A dynamic plot is displayed on the screen in just one frame. One may control the display by using as many frames as needed.