Data Visualization Data visualization principles Tell a story
- Slides: 5
Data Visualization • Data visualization principles. – Tell a story – Graphical integrity (lie factor) – Minimize graphical complexity (data ink, chartjunk)
Bonus Assignment Chart #1: Monthly Sales 150000 140000 130000 120000 1100000 90000 80000 70000 60000 50000 Issues: • Tell a Story ян в 11 фе в 11 ма р11 ап р11 ма й 1 ию 1 н 1 ию 1 л 11 ав г-1 1 се н 11 ок т-1 1 но я 11 де к 11 – The vertical axis isn’t labeled. We don’t know the unit. Monthly Sales ($) 160000 140000 120000 100000 80000 60000 40000 20000 ян в 11 фе в 11 ма р11 ап р11 ма й 1 ию 1 н 1 ию 1 л 11 ав г-1 1 се н 11 ок т-1 1 но я 11 де к 11 0 • Graphical Integrity – The vertical axis does not start from zero • Graphical Complexity – Horizontal and vertical lines are unnecessary (Chartjunk)
Bonus Assignment Chart #1: Monthly Sales 150000 140000 130000 120000 1100000 90000 80000 70000 60000 50000 Issues: • Tell a Story ян в 11 фе в 11 ма р11 ап р11 ма й 1 ию 1 н 1 ию 1 л 11 ав г-1 1 се н 11 ок т-1 1 но я 11 де к 11 – The vertical axis isn’t labeled. We don’t know the unit. • Graphical Integrity – The vertical axis does not start from zero Monthly Sales ($) 160000 140000 120000 100000 80000 60000 • Graphical Complexity – Horizontal and vertical lines are unnecessary (Chartjunk) 40000 20000 ян в 11 фе в 11 ма р11 ап р11 ма й 1 ию 1 н 1 ию 1 л 11 ав г-1 1 се н 11 ок т-1 1 но я 11 де к 11 0 This also works
Bonus Assignment Chart #2: Quantity Sold by Customer Type Silver 32% Gold 40% Issues: • Graphical Integrity – The 3 D chart makes it difficult to compare the sizes Platinum 28% Quantity Sold by Customer Type Silver 32% Gold 40% Platinum 28% • Graphical Complexity – The 3 D chart requires more ink (Chartjunk)
Bonus Assignment Chart #3: Issues: Total Sales by State 200000 • Tell a Story 184847 136338 107344 92287 76853 67524 100000 66318 54359 53469 46094 47377 33991 33014 32756 30667 26935 20076 19389 50000 9986 150000 126167 AZ CA CO FL GA HI LA MI MN MO NC NY OH PA RI SC TN UT VA WA 0 – Vertical axis isn’t labeled. We don’t know the units – Because there are many states to compare, horizontal lines may be helpful Total Sales by State ($) 200000 180000 160000 140000 120000 100000 80000 60000 40000 20000 0 • Graphical Integrity – The 3 D chart makes it difficult to compare sizes – The cone-shaped bars make it even harder to compare sizes • Graphical Complexity AZ CA CO FL GA HI LA MIMNMONC NY OH PA RI SC TN UT VAWA – The 3 D chart requires more ink (Chartjunk) – The number labels are unnecessary