Josh Pepper Susan Kegley, Ph.D. Overview
What is a motion chart? What does “multidimensional” mean for PUR data? Motion chart examples with PUR Data: Bar Charts Bubble Charts Line Charts Advantages and Limitations Traditional Scatter Plot: Fertility Rate vs. GDP by Country
Correlation of two quantitative parameters Uniform Size Points 2 dimensions X-Axis (GDP) Y-Axis (Fertility Rate)
Source: CIA World Factbook What is a Motion Chart?
Five Dimensions:
• X-Axis (Life Expectancy)
• Y-Axis (Fertility Rate)
• Point Color (GDP)
• Point Size (Population)
• Time (1960 – 2008) What does Multidimensional Mean for PUR Data? Parameters used in today’s example data: 1) Acres Treated with Pesticide (All California) 2) Pounds of Pesticide Used (All California) 3) Application Rates 4) Percent Aerial/Ground Applications 5) Time • By year, month, week, day
Many more dimensions of data: • Chemical Use & Classification • Location of Pesticide Use by County, MTRS, Grower_id Chemicals With Chronic Toxicity to Bees
Import data from Excel spreadsheet or other data formats Static Bar Chart
Use of Chemicals with Chronic Toxicity to Bees in 2005 Acres Treated with Chemical Treated Acres
Chemical Chemicals with Chronic Toxicity to Bees: Motion Bar Chart for 2005-2009
Three Dimensions of Data - Chemical, Acres Treated, Time Dynamic Axes Chemicals Chronically Toxic to Bees: Bubble Line Chart for 2005-2009
Multidimensional data for each chemical: • Acres treated, time, % aerial apps, pounds chemical used Identifying outliers visually Weekly Use of Chemicals for 2009: Dynamic Line Chart
Easily transition between Bubble Line Chart, Line Chart & Bar Chart Auto-scaling Line Chart Dynamic Axes Advantages and Limitations of Google Motion Charts
Advantages Easy to learn and use Uses the power of Google’s servers Uses “cloud computing” Publish as webpage or embedded graphic Substitutes for other graphing programs Free
Limitations Requires internet connection (or video screen capture) Automatically interpolates data No linear regression or other statistics Summary
Visualize change in many dimensions of data over time Easily share your charts on the internet More potential with motion scatter plots Correlation of two quantitative parameters PUR Data correlated with other data sets More information: Google Motion Charts: http://code.google.com/apis/visualization/documentation/gallery/mot ionchart.html Hans Rosling: TED Talk about dynamic data http://www.ted.com/speakers/hans_rosling.html