HUMAN COMPUTER INTERACTION Lab. Of Distributed Multimedia Information Systems and Applications | TUC/MUSIC Department of Electronic and Computer Engineering.

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Presentation transcript:

HUMAN COMPUTER INTERACTION Lab. Of Distributed Multimedia Information Systems and Applications | TUC/MUSIC Department of Electronic and Computer Engineering Technical University of Crete Rontidis Pavlos Souris Anastasios

mDS

Description: Node-based binary tree with the properties: A left sub-tree of a node contains only nodes with keys less than … A left sub-tree of a node contains only nodes with keys less than … Description: AVL tree is a self-balancing binary search tree, and it was the first such data structure to be invented. Description: A red-black tree is a type of self-balancing binary search tree, a data structure used in computing science, typically used to implement associative arrays. s

menu mDS

The purpose of this test is to test basic knowledge on BSTs. Time Limit: 3 min Completed in: 2min Date finished: 2/22/2011 The purpose of this test is to test two operation on BSTs, Insertion and deletion. Time Limit: 6 min Not taken The purpose of this test is to test BST traversals. Insertion and deletion. Time Limit: 10 min Not taken

Tap start to start the timer. Tap start to complete or exit the Quiz. Start Finish Tap start to start the timer. Tap start to complete or exit the Quiz.

Multiple choice Description… Answer 1…. Answer 2… Answer 3… Start Finish 00:01

The purpose of this test is to test basic knowledge on BSTs. Time Limit: 3 min Completed in: 2min Date finished: 2/22/2011 The purpose of this test is to test two operation on BSTs, Insertion and deletion. Time Limit: 6 min Failed: 10min Not Completed The purpose of this test is to test BST traversals. Insertion and deletion. Time Limit: 10 min Not taken

mDS Prototype: Animations List Search for key = 6 Search for key = 9 Node creation & insertion In-order Traversal iPhone demo iPad demo change options

Change options return practice animation help options

Option screen mDS

Option screen mDS

mDS Prototype: Animations List Search for key = 6 Search for key = 9 Node creation & insertion In-order Traversal iPhone demo iPad demo change options

Searc h 6 return practice animation help options

Enter node’s key: You tapped inside an empty node.

Enter node’s key: 6

< < 10 is True cancel

> 6 > 3 is True cancel

> 6 < 8 is True cancel

= 6 is True cancel

Node found ! cancel

mDS Prototype: Animations List Search for key = 6 Search for key = 9 Node creation & insertion In-order Traversal iPhone demo iPad demo change options

Search 9 return practice animation help options

You tapped inside an empty node. Enter node’s key:

You tapped inside an empty node. Enter node’s key: 9

< < 10 is True cancel

> 9 > 3 is True cancel

> 8 is True cancel

Leaf reached. Node not found. NULL cancel

mDS Prototype: Animations List Search for key = 6 Search for key = 9 Node creation & insertion In-order Traversal iPhone demo iPad demo change options

Insert 9

Node created !

Enter node’s key: You tapped inside an empty node.

Enter node’s key: 9 You tapped inside an empty node.

< current.key  root.key 9 < current.key Next step: current  current.left cancel

> current.key  3 9 > current.key Next step: current  current.right cancel

found position for key = NULL Pointer to NULL: Allocate space for new node. current.key  8 9 > current.key cancel

Algorithm finished. Result: Insertion completed. 9 Node inserted. cancel

mDS Prototype: Animations List Search for key = 6 Search for key = 9 Node creation & insertion In-order Traversal iPhone demo iPad demo change options

In- order traver sal

Gesture initiated an in-order traversal. cancel

Printed: 2 Recursion to left sub-tree. cancel

Printed: 2, 3 cancel

Printed: 2, 3, 6 cancel

Printed: 2, 3, 6, 8 cancel

Printed: 2, 3, 6, 8, 10 Visited root. cancel

Printed: 2, 3, 6, 8, 10, 15 Recursion to right sub-tree. cancel

Printed: 2, 3, 6, 8, 10, 15, 16 cancel

Printed: 2, 3, 6, 8, 10, 15, 16, 17 cancel

NULL cancel In-order traversal completed. Keys printed in ascending order. Printed: 2, 3, 6, 8, 10, 15, 16, 17

mDS Prototype: Animations List Search for key = 6 Search for key = 9 Node creation & insertion In-order Traversal iPhone demo iPad demo change options