Data Visualization Skill

Overview

Master the art and science of data visualization to communicate insights effectively using modern tools and design principles.

Core Topics

Visualization Principles

• Chart selection guidelines
• Color theory for data visualization
• Visual hierarchy and attention
• Accessibility in visualization

Tools & Platforms

• Tableau (dashboards, calculated fields, LOD expressions)
• Power BI (DAX, data modeling, reports)
• Python (Matplotlib, Seaborn, Plotly)
• R (ggplot2, Shiny)

Chart Types

• Comparison charts (bar, column, dot plot)
• Trend charts (line, area, slope)
• Distribution charts (histogram, box plot, violin)
• Relationship charts (scatter, bubble, heatmap)
• Composition charts (pie, treemap, stacked bar)

Data Storytelling

• Narrative structure for data presentations
• Annotation and callout techniques
• Interactive dashboard design
• Executive presentation best practices

Learning Objectives

• Select appropriate visualization for data and audience
• Create professional dashboards in Tableau and Power BI
• Design effective data stories
• Apply visualization best practices

Error Handling

Error Type	Cause	Recovery
Data connection failed	Source unavailable	Check connection, use cached data
Slow dashboard	Too much data	Aggregate, filter, or use extracts
Chart unreadable	Poor design choice	Apply chart selection guidelines
Accessibility issue	Color/contrast	Use colorblind-safe palette
Mobile display broken	Non-responsive	Redesign for mobile-first

Related Skills

• statistics (for data to visualize)
• programming (for programmatic visualization)
• career (for presenting to stakeholders)