9. 55 65 7560 70 80
1
Original Engineering data
2
3
damages atdamages at
the hottestthe hottest
and coldestand coldest
temperaturetemperature
-- managementmanagement
Would you launch?
15. 1. Y-Axis amount of damage (not number of damage)
2. Include successes
55 65 7560 70 80
4
8
12
Clearer
16. 1. Y-Axis amount of damage (not number of damage)
2. Include successes
3. Mark Differences
55 65 7560 70 80
4
8
12
Clearer
17. 1. Y-Axis amount of damage (not number of damage)
2. Include successes
3. Mark Differences
4. Normalize same temp
55 65 7560 70 80
4
8
12
Clearer
18. 1. Y-Axis amount of damage (not number of damage)
2. Include successes
3. Mark Differences
4. Normalize same temp
55 65 7560 70 80
4
8
12
Clearer
Damage on every flight
below 65
No damage on every
flight above 75
19. 1. Y-Axis amount of damage (not number of damage)
2. Include successes
3. Mark Differences
4. Normalize same temp
55 65 7560 70 80
4
8
12
Clearer
20. 1. Y-Axis amount of damage (not number of damage)
2. Include successes
3. Mark Differences
4. Normalize same temp
5. Scale known vs unknown
55 65 7560 70 80
4
8
12
4
8
12
30 40 5035 45
XX
Clearer
21. Difficult
NASA Engineers Fail
Congressional Investigators Fail
Data Visualization is Difficult
But …
Lack of Clarity can be devastating
22. Counties in US
3101 Counties
50 pages
“The humans … are exceptionally
good at parsing visual information.”
Knowledge representation in cognitive science. Westbury, C. & Wilensky, U. (1998)
23. “If I can't picture it, I can't understand it”
Anscombe's Quartet
I II III IV
x y x y x y x y
10 8.04 10 9.14 10 7.46 8 6.58
8 6.95 8 8.14 8 6.77 8 5.76
13 7.58 13 8.74 13 12.74 8 7.71
9 8.81 9 8.77 9 7.11 8 8.84
11 8.33 11 9.26 11 7.81 8 8.47
14 9.96 14 8.1 14 8.84 8 7.04
6 7.24 6 6.13 6 6.08 8 5.25
4 4.26 4 3.1 4 5.39 19 12.5
12 10.84 12 9.13 12 8.15 8 5.56
7 4.82 7 7.26 7 6.42 8 7.91
5 5.68 5 4.74 5 5.73 8 6.89
Average 9 7.5 9 7.5 9 7.5 9 7.5
Standard Deviation 3.31 2.03 3.31 2.03 3.31 2.03 3.31 2.03
Linear Regression 1.33 1.33 1.33 1.33
- Albert Einstein- Albert Einstein
28. What is a day in the life lookWhat is a day in the life look
like for a DBA who haslike for a DBA who has
performance issues?performance issues?
Tuning the Database
Anscombe's Quartet
I II III IV
x y x y x y x y
Average 9 7.5 9 7.5 9 7.5 9 7.5
Standard Deviation 3.31 2.03 3.31 2.03 3.31 2.03 3.31 2.03
Linear Regression 1.33 1.33 1.33 1.33
ComplexComplex
AveragesAverages
29. Imagine Trying to Drive your
Car
And is updated once and hourAnd is updated once and hour
Or would you like it toOr would you like it to
look …look …
Would you want your dashboard to look like :Would you want your dashboard to look like :
30. How Can We Open the Black Box?
Max CPU
(yard stick)
Top ActivityTop Activity
SQLSQL
SessionsSessions
LOADLOAD
Editor's Notes
The O-rings of the solid rocket boosers were not designed to erode.
Erosion was a clue that something was wrong.
Erosion was not something from which safety could be inferred
- Richard Feynman
The O-rings of the solid rocket boosers were not designed to erode.
Erosion was a clue that something was wrong.
Erosion was not something from which safety could be inferred
- Richard Feynman