Numerical visualization library

In general, this library can be used to visualize numerical data graphically. In a sense, its idea is like matplotlib library of Python; however, currently my library only support line graph.

Basic line graph has 1 to n straight lines with starting and ending points determined by the coordinates (x, y) in the given data. Adjacent points are connected with a straight line.

• The given data is read from a CSV file, which is given by the user. The CSV file should have column names (that can be used as category names) and corresponding values.

• The legend (the colors used) are included automatically in the graph. The user are able to name the axes and units of the axes.

• The coordinate axes are numbered in a way that there is not too much spacing between labels and labels are not drawn on top of each other.

• The user has the possibility to decide whether a grid will be drawn behind the graph. The grid is drawn with a faintly visible dotted line. The size of the grid tiling can be configurable by the user.

The library can be re-structured a bit to allow potential expandability. For example, adding other graph types such as basic histogram and pie diagram should be relatively simple.

Directory structure

The core structure:

numerical-visualization-library
│   README.md
│   document.pdf    
│
└───src
│   │
│   └───main
│   │
│   └───test
│   
└───datasets

Project document

Check the file document.pdf for more details:

• User interface

  Introduction to how to use the program: How is it started? What can you do with it? What commands the user can give and how, etc.

  Explantion of an example use case: visualize Open, High, Low, and Close prices of silver in the last 30 days. This silver price dataset is downloaded from Kaggle.

• Program structure

  How the program is split into the main sub-parts? What are the relationships between the main classes?

  UML class diagram is included in this part. Key methods in classes are introduced in the UML diagram.

• Algorithms

  How the program performs the main tasks:

  Drawing basic line diagram.

  Scaling from number (i.e., from the input data) to pixel.

  Setting up the ticks on x axis and y axis.

  Setting up the grids.

• Testing

  A description of how the program is tested, including unit test and GUI test.

  So far, all tests have been passed.