SILS iSchool

22 Oct 2018

Value Added | daily

Class Schedule

Basics | sessions 01-05

22 AUG | intro
27 AUG | clients
29 AUG | servers
05 Sep | networks
10 Sep | basics lab

Web Development | sessions 06-11

12 Sep | structural layer
17 Sep | presentational layer
19 Sep | working with layers
24 Sep | behavior layer
26 Sep | images & design
01 Oct | website lab

Document Markup | sessions 12-14

03 Oct | object layers
08 Oct | graphics
10 Oct | document markup lab

Spreadsheets | sessions 15-19

15 Oct | spreadsheets |
17 Oct | formulas & functions |

 22 Oct  |  thoughts about data display  | creating graphical data displays | next session

 18 Oct | Fall Break 
24 Oct | database tools
29 Oct | spreadsheets lab

Relational Database | sessions 20-26

31 Oct | relational databases
05 Nov | tables
07 Nov | relationships
12 Nov | input & output
14 Nov | SQL
19 Nov | complex queries
26 Nov | databases lab
 21 Nov | Thanksgiving 

Presentation | sessions 27-30

28 Nov | presentation design
03 Dec | presentation delivery
05 Dec | presentation lab
12 Dec | 0800-1100 | final in class presentation

slides for today's session
The history of data visualization is not extremely long.
There are a few names to know and things to think about.

Thinking about the reasons and theory of data visualization

Quoting Edward Tufte in the Introduction of The Visual Display of Quantitative Information

Data graphics visually display measured quantities by means of the combined use of points, lines, a coordinate system, numbers, symbols, words, shading, and color ... Modern data graphics can do much more than simply substitute for small statistical tables. At their best, graphics are instruments for reasoning about quantitative information. Often the most effective way to describe, explore and summarize a set of numbers - even a very large set - is to look at pictures of those numbers. Furthermore, of all methods for analyzing and communicating statistical information, well-designed graphics are usually the simplest and at the same time the most powerful.

With that in mind, let's together consider how one can display data in chart form

Visualization of data has a long history, but the addition of more powerful computing and newer programs has given us the opportunity to display data in ways that are enlightening.

The tool, however can be misused, either by intent or by ignorance

How to Lie with Statistics and The Best and Worst of Statistical Graphics by Michael Friendly at York University, Canada

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Some additional thoughts on data display

Data can be displayed in good and bad ways

Scholars at York University in Canada have put together a useful gallery of good methods of display and also of ideas to avoid

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Does it matter?

Lessons for data analysts from the Challenger disaster tells us good data display could be a life or death issue.

But there are always several different ways to view the same situation and not everyone agrees with Tufte.

Let's re-iterate our points again.

Dilbert cartoon from 07 March 2009

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