Recommendation

Recommended

Link

http://jhave.org/learner/graphs/floyd/floyd.php

Delivery Method

Java Web Start

License

CreativeCommons

Language

English

Author

Richard Teviotdale, Tom Naps

Institution

University of Wisconsin - Oshkosh

Project

JHAVÉ

RelationshipToProject

PartOfProject

Works

Yes

Description

Visualization of Floyd's all-pairs shortest paths algorithm. Includes dynamically highlighted pseudo code. Associated HTML page contains an algorithm description, pseudo code, and example trace, and discussion of efficiency analysis.

Evaluation

The AV is set up as a series of "slides" in one pane, and pseudocode in the adjacent pane. As the user steps through the "slides", the associated pseudocode is highlighted. Occasional questions pop up for the user to answer. In addition to coloration for the graph as the algorithm progresses, there is a 2D array showing the algorithm's currently computed shortest distances. The explanation pages are a pretty good supplement to the AV (and vice versa). Students might still have a little bit of difficulty understanding the concept of the "k paths", and there is no reference to dynamic programming, which would be helpful.

ActivityLevel

Step Control; Questions; Canned Data

GoodFor

Self Study; Lab Exercise

Screenshots

Videos

References

HowToUse

Clicking on the link above will take you to a login page for Jhave. If you do not want to create an account at jhave.org, use anonymous@anonymous.com as your user name and anonymous as your password when you are asked to login. You will then be taken to the Jhave page for this AV. Some Jhave AVs include a tutorial on how the AV itself or the underlying algorithm works. At the bottom are links to the AV (you can run it with a built-in quiz system on or off). The first time you try to run any Jhave exercise, you will have to download the Jhave webstart application. This should happen automatically when you click the link. (You might need to install Java WebStart if it is not on your machine.) Once you download the Jhave application, the AV should start automatically. You can then step through the AV by repeatedly clicking the right arrow button. Occasionally, you will be given a multiple-choice or short-answer question to answer.

First Visited

2008-07-08

Last Visited

2008-07-10

Last Updated

2008-07-01

Topic

AllPairsShortestPaths

Community

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