Visualizing Data:
Making Numbers Come Alive
October 23, 2013 ILEAD Presentation
Chris Taylor
Director, Upper Arlington Pub...
WHAT TYPE OF CHART TO USE?
Horizontal Bar Charts
UAPL Physical Checkout by Format for September 2013
Books
DVDs

Bluray
Books on CD
Music CDs
Magazin...
Vertical Bar Charts
UAPL 2013 eResource Checkout by Month
8,000

7,000

6,000

5,000
Zinio

4,000

Freegal
Overdrive

3,00...
Line Charts
Hardcover Children's Books Average Cost
$23.00
$22.00
$21.00

$20.00
$19.00
$18.00
$17.00
$16.00

$15.00
1999
...
Pie Charts
Chart vs. Table
2012 Collection size by format: Franklin County Libraries
Thousands
1,600

Print

1,400

Bexley

1,200
1,0...
Lies, Damned Lies, and Statistics

GOOD DESIGN BASICS
Axis Start and Number Length
UAPL Circulation by Format and Year
Total Print

Total Media

1,015,000

Total Virtual

1,100...
Quite a Different Story
UAPL Circulation by Format and Year
In Thousands

Total Print

Total Media

Total Virtual

1,200

...
Another View
UAPL Circulation by Format and Year
Thousands
1,200

Total Print

Total Media

Total Virtual

1,000
800
600
4...
Color, Clutter & Consistency
Academic Libraries Product Mix, 2012-2013
Small/Medium Public
Membership, $
6,300
Workshops, $7
5

Supplies &
Equipment, $...
Mix your indicators for different data
Tables
Library

BEXLEY CML

GRANDVIEW SOUTHWEST UAPL

Total Collection Size 263,113 1,745,635 254,206

Library

BEXLEY

CM...
Better
Library
BEXLEY
CML
GRANDVIEW
SOUTHWEST
UAPL
WESTERVILLE
WORTHINGTON

Total Collection Size
263,113
1,745,635
254,20...
Even Better
Library
CML
Worthington
UAPL
Southwest
Westerville
Bexley
Grandview

Total Collection Size
1,745,635
567,589
5...
INFOGRAPHICS
Early Infographic?
Free Infographic Websites
http://piktochart.com
http://www.easel.ly
http://infogr.am
More Data Display Ideas
Chris Taylor
Director Upper Arlington Public Library
ctaylor@ualibrary.org

QUESTIONS?
Resources
• http://www.slideshare.net/MattHunter/howto-present-data-in-powerpoint
• http://www.garrreynolds.com/presotips/...
Visualizing Data: Making Numbers Come Alive
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Visualizing Data: Making Numbers Come Alive

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ILEAD Ohio Presentation October 23, 2013
Best practices for charts and tables

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  • You are judged by the work you present, not the work you do.Why use charts, tables and graphics at all?We are generally weak at understanding data. Visualizations exploit the brain’s natural hardware, making it easier for your audience to understand and remember your data."Data slides aren't really about the data. They are about the meaning of the data.“~~Nancy Duarte, author of slide:ology
  • From: http://lifehacker.com/5909501/how-to-choose-the-best-chart-for-your-dataFirst, Understand the Message You're Trying to Present with Your DataWhen you're putting together a chart, you're trying to show one of four things with the data you have: a relationship between data points, a comparison of data points, a composition of data, or a distribution of data.A relationship tries to show a connection or correlation between two or more variables through the data presented, like the market cap of a given stock over time versus overall market trend.A comparison tries to set one set of variables apart from another, and display how those two variables interact, like the number of visitors to five competing web sites in a single month.A composition tries to collect different types of information that make up a whole and display them together, like the search terms that those visitors used to land on your site, or how many of them came from links, search engines, or direct traffic.A distribution tries to lay out a collection of related or unrelated information simple to see how it correlates, if at all, and to understand if there's any interaction between the variables, like the number of bugs reported during each month of a beta.
  • http://www.flickr.com/photos/amit-agarwal/3196386402/
  • Bar graphs, line charts, and scatter plots work well with out natural abilities – use abundantlyUse horizontal bar charts to compare quantities.
  • Use vertical bar charts to show changes in quantity over time. Try to limit the bars to four - eight.
  • Used to demonstrate trends.
  • Pie charts, bubble charts and other area graphics are more trouble some – use with reservationUse to show that make up of a wholeCould use for budget or expenses
  • In general, tables are good for side-by-side comparisons of quantitative data.They can lack impact.If you want to show that one number is significantly higher than others, it would be best to show that in the form of a bar chart.If you want to downplay that fact a table will display that information in a less dramatic or emotional way.If one data element is so much higher than the others, that you cannot see the relative differences in the others, a table would work better.
  • It is said that "There are three kinds of lies: lies, damned lies, and statistics”
  • People lie with axes more than they realize and often unintentionallyPowerPoint and Excel will often automatically reset the Y-axis to a numbergreater than zero so odds are every graph will use a slightly different scaleWhen looking at more than one graph at a time or a series of charts about similar data make sure the axis are the same.If a number is 2x as big as another the bar should be 2x as long (or the height of a line twice as high) or the area of a graphical elementWhen an Axis doesn’t start at zero, the chart “lies” and the slide will not tell the correct storyShorten numbers and add a label instead of repeating a lot of un-necessary digits. It takes the brain longer to figure out which is the higher number when comparing many places.What story does this set of charts tell?
  • All on the same scale with shortened numbersStill some repetitionThe background color doesn’t really add anything (except dollars to your toner budget)
  • 3D doesn’t always work wellSlide title (Academic Libraries…._ is smaller than each chart titleMissing Lines from some labelsJust like axis needing to be the same in a series of charts, so should colors
  • Use color to communicate meaning. Use different color to call attention to different seriesBe aware of color weaknessesAvoid very high contrast which can annoy the eye10% of Western men over the age of 40 are partially color blind (blue/green)The color red communicates different meanings in different culturesClutter:Took off “%”Made sure all the lines were still there as appropriate.Made Slide Title bigger
  • From LJPosted Monday, October 14, 2013 - 12:07How Low Can Our Book Budgets Go?Can clearly tell that the bars show something different from the circles connected by a lineCan have two vertical axis for the different data seriesBreaks a few design rules:Keep the numbers shortDon’t make the audience turn their heads
  • Use Tables when:You want your audience to compare individual valuesYou need to use precise valuesThere are multiple units of measureRules of thumb:Put data into columns, not rowsRight align the dataRemove excess digits
  • Infographic or Information GraphicChris Lema,WordPress consultant, defines an Infographic as a visual depiction of data, designed to tell a story that is more likely to be read & remembered.We remember pictures better than facts.
  • From LJPosted Monday, October 14, 2013 - 12:07How Low Can Our Book Budgets Go?More books are getting published, but public libraries are buying less“The actual number of books added to public library shelves has also dropped substantially over the past 20 years. According to Book Industry Trends (the book industry’s standard statistical report), in 1989 public libraries across the United States purchased a total of 41.3 million volumes, but by 2009 public libraries bought only 27.9 million books—a decline of more than 32% over 20 years (see Figure 1). As a result, public libraries’ share of the total book market has plummeted from 4% in 1989 to 1% in 2009.”
  • http://www.visual-literacy.org/periodic_table/periodic_table.html
  • Transcript of "Visualizing Data: Making Numbers Come Alive"

    1. 1. Visualizing Data: Making Numbers Come Alive October 23, 2013 ILEAD Presentation Chris Taylor Director, Upper Arlington Public Library ctaylor@ualibrary.org
    2. 2. WHAT TYPE OF CHART TO USE?
    3. 3. Horizontal Bar Charts UAPL Physical Checkout by Format for September 2013 Books DVDs Bluray Books on CD Music CDs Magazines Playaways Other 0 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000
    4. 4. Vertical Bar Charts UAPL 2013 eResource Checkout by Month 8,000 7,000 6,000 5,000 Zinio 4,000 Freegal Overdrive 3,000 2,000 1,000 Jan Feb Mar Apr May Jun Jul Aug Sep
    5. 5. Line Charts Hardcover Children's Books Average Cost $23.00 $22.00 $21.00 $20.00 $19.00 $18.00 $17.00 $16.00 $15.00 1999 2002 2005 2008 2011
    6. 6. Pie Charts
    7. 7. Chart vs. Table 2012 Collection size by format: Franklin County Libraries Thousands 1,600 Print 1,400 Bexley 1,200 1,000 Digital 135,092 18,143 12,710 96,982 1,464,406 73,650 112,566 95,013 Grandview 132,495 13,992 12,244 95,035 Southwest 264,763 21,616 23,398 101,031 Upper Arlington 344,759 59,799 38,188 97,031 Westerville 229,985 36,791 24,984 100,297 Worthington 391,685 28,119 49,276 98,452 Columbus Print 800 Video 600 Audio Software 400 Video Audio Digital 200 0
    8. 8. Lies, Damned Lies, and Statistics GOOD DESIGN BASICS
    9. 9. Axis Start and Number Length UAPL Circulation by Format and Year Total Print Total Media 1,015,000 Total Virtual 1,100,000 1,080,000 40,000 1,060,000 1,010,000 45,000 35,000 1,040,000 1,005,000 30,000 1,020,000 1,000,000 25,000 1,000,000 20,000 980,000 995,000 15,000 960,000 940,000 985,000 10,000 920,000 990,000 5,000 900,000 2010 2011 2012 2010 2011 2012 2010 2011 2012
    10. 10. Quite a Different Story UAPL Circulation by Format and Year In Thousands Total Print Total Media Total Virtual 1,200 1,200 1,200 1,000 1,000 1,000 800 800 800 600 600 600 400 400 400 200 200 200 - - - 2010 2011 2012 2010 2011 2012 2010 2011 2012
    11. 11. Another View UAPL Circulation by Format and Year Thousands 1,200 Total Print Total Media Total Virtual 1,000 800 600 400 200 2010 2011 2012
    12. 12. Color, Clutter & Consistency
    13. 13. Academic Libraries Product Mix, 2012-2013 Small/Medium Public Membership, $ 6,300 Workshops, $7 5 Supplies & Equipment, $2, 420 ILS/Server Hosting, $11,50 0 Membership, $ 4,500 Workshops, $7 5 Large Private Supplies & Equipment, $61 5 eResources, $1 93,999 eResources, $5 6,544 Small/Medium Private Membership, $ 117,300 MARS Authority Control, $585 Supplies & Equipment, $30 ,408 Web & Proxy Hosting, $11,87 5 ILS/Server Hosting, $649,7 08 Workshops, $5 25 eResources, $1, 163,328
    14. 14. Mix your indicators for different data
    15. 15. Tables Library BEXLEY CML GRANDVIEW SOUTHWEST UAPL Total Collection Size 263,113 1,745,635 254,206 Library BEXLEY CML Total Collection Size 263,113 1,745,635 Library BEXLEY 410,808 539,777 392,198 567,589 GRANDVIEW SOUTHWEST UAPL WESTERVILLE WORTHINGTON 254,206 410,808 CML GRANDVIEW SOUTHWEST Total Collection Size 263,113 1,745,635 WESTERVILLE WORTHINGTON 254,206 539,777 392,198 567,589 UAPL WESTERVILLE WORTHINGTON 410,808 539,777 392,198 567,589
    16. 16. Better Library BEXLEY CML GRANDVIEW SOUTHWEST UAPL WESTERVILLE WORTHINGTON Total Collection Size 263,113 1,745,635 254,206 410,808 539,777 392,198 567,589
    17. 17. Even Better Library CML Worthington UAPL Southwest Westerville Bexley Grandview Total Collection Size 1,745,635 567,589 539,777 410,808 392,198 263,113 254,206
    18. 18. INFOGRAPHICS
    19. 19. Early Infographic?
    20. 20. Free Infographic Websites http://piktochart.com http://www.easel.ly http://infogr.am
    21. 21. More Data Display Ideas
    22. 22. Chris Taylor Director Upper Arlington Public Library ctaylor@ualibrary.org QUESTIONS?
    23. 23. Resources • http://www.slideshare.net/MattHunter/howto-present-data-in-powerpoint • http://www.garrreynolds.com/presotips/design/
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