Each algorithm visualization in HAlVis is structured as three main modules and two supporting modules. The first module (Conceptual View) explains the core operations of the algorithm and illustrates them using a familiar, real-world analogy. For instance, the analogy for the Selection Sort algorithm shows a line of people that sort themselves by height. The second module (Detailed View) first presents, side-by-side, the pseudocode description and textual explanation of the algorithm. Technical terms in this explanation are hyperlinked to definitions and additional illustrations of fundamental algorithmic principles in a supporting module (Fundamentals). Subsequently, four representations are presented simultaneously - one is a detailed animation of the operation of the algorithm on a small data set; the second is the pseudocode of the algorithm in which steps are highlighted synchronously with the animation; the third is a verbal explanation of the events occurring in the animation, and the fourth is a scoreboard of variables. The third module (Populated View) presents an animation of the algorithm's operation on a much larger data set. It also allows the user to make predictions about parameters of the algorithm's behavior and compare these against actual values. This facility and questions provided by a supporting module (Questions) are intended as self-assessment tools for the learner. < > CONTENTS EXIT
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Variable scoreboard
Verbal explanations of events in the animation
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Conceptual View
© IIS Lab, Auburn University
© IIS Lab, Auburn University
Architecture
Animated analogy illustrating algorithm’s core operations
Verbal explanation of algorithm’s core operations
Pseudocode representation of the algorithm
Verbal explanation of pseudocode steps
Fundamentals
Questions A broad animation of the algorithm Predicting behaviors and comparing against the animation A detailed animation of the algorithm Animation steps highlighted in pseudocode
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Contents
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© IIS Lab, Auburn University
HAlVis Architecture
Analogical Description Detailed Look Algorithm in Action
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Questions
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Architecture
HAlVis
Selection Sort Example
Hypermedia Algorithm Visualizations
Intelligent & Interactive Systems Laboratory Computer Science & Software Eng. Dept. Auburn University
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CONTENTS
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Conceptual View
Clicking on the Show Me the First Pass button will start an animation in which the first person in the line asks the question “who is shorter than me?”. Each person down the line answers this question.