Multidimensional Scaling


Detailed Time Line and Tasks

Specification Apr 18-May 27 6 weeks
  1. Determine algorithm(s) to aquire 3D data.
  2. Determine interface requriments.
  3. Determine output requriments.
  4. Begin studying DirectX

Design May 30-July 1 5 weeks
  1. Design objects needed from requirments.
  2. Create wiki pages containing objcets, methods, members and algorithms.

Implementaiton July 5-Jul 29 4 weeks
  1. Implement objects.
  2. Build the interface.
  3. Testing

Testing Aug 01-Aug 12 2 weeks
  1. Test to ensure complete, correct product.

Timeline modifications
  1. 2 weeks added to spec on 2005-05-23
  2. 1 weeks removed from design on 2005-05-23
  3. 1 weeks removed from testing on 2005-05-23

  1. 1 weeks added to design on 2005-06-17
  2. 1 weeks removed from implementation on 2005-06-17

(huiming 2005-07-10)
  1. Since the algorithm wouldn't be implemented, testing time merged into implementation.
  2. Testing 2 weeks removed

The Basic Concept of Multidimensional Scaling

The following is the basic explanation of Multidimensional Scaling-- the 3D graph.

Multidimensional scaling (MDS) allows you to visualize how near points are to each other for many kinds of distance or dissimilarity measures and can produce a representation of your data in a small number of dimensions. MDS does not require raw data, but only a matrix of pairwise distances or dissimilarities.

MDS takes as an input a matrix of interpoint distances and creates a configuration of points by some mathematical matrix manipulation. Ideally, those points are in two or three dimensions, and the Euclidean distances between them reproduce the original distance matrix. Thus, a scatter plot of the points created by MDS provides a visual representation of the original distances. See the attachment below.

Team Members

Weekly Reports


Useful Links

C# OpenGL:

An example:


Topic attachments
I Attachment Action Size Date Who Comment
InstructionsofMulti.docdoc InstructionsofMulti.doc manage 20.0 K 17 Aug 2005 - 15:21 HuimingLi a simple user manual
pavis.pdfpdf pavis.pdf manage 3160.2 K 20 May 2005 - 16:19 ShuoChen The Multidimensional scaling method research
Topic revision: r13 - 17 Aug 2005, HuimingLi

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