Enhanced Graphviz for Course Prerequisite Visualization

• Day: 2023-11-13
• Time: 17:55 to 18:59
• Project: Dev
• Workspace: WP 2: Operational
• Status: Completed
• Priority: MEDIUM
• Assignee: Matías Nehuen Iglesias
• Tags: Graphviz, Visualization, Course Prerequisites, Python, Graph Layout

Description

Session Goal

The session aimed to enhance the visualization of course prerequisites using Graphviz, focusing on the CBC courses and their representation within a graph.

Key Activities

• Identified and addressed an error in graph generation related to CBC courses.
• Outlined steps for creating course prerequisite graphs using Graphviz, including installation and data preparation.
• Modified Graphviz code to correctly represent CBC courses as a cohesive subgraph, using invisible edges for proper linkage.
• Improved graph layout by repositioning nodes and using invisible anchors, ensuring the graph fits an A4 portrait layout.
• Explored techniques for controlling node positioning and subgraph styling, including setting background colors and using layers for complex visualizations.
• Discussed Graphviz’s output format options and limitations of the layers attribute for non-PostScript formats.

Achievements

• Successfully implemented a method to treat the CBC subgraph as a single node linked to ‘E. Media’.
• Enhanced the visual layout of the graph to improve clarity and organization.

Pending Tasks

• Further exploration of alternative methods for layering in Graphviz to overcome current limitations.
• Consideration of additional output formats for better visualization quality.

Evidence

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