Information energy 2015_06_03
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Simple datavisualisation to unlock Big Data
Stephan Okhuijsen3 juni 2015
Itude – Datagraver - VOJN
@Steeph - @Datagraver
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Tools versus humans
• Tools can be too complex and have too many features
• Tools distract from thinking about what you really need/want to know
• Start simple• Start a data safari (dixit Remko
Helms)
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The best tool to explore Big Data is your curiosity
And it is fun!
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START WITH A QUESTION
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MOST BASIC: COLORCODING
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Create a baseline
• Even distribution for every workday = 20%
• Mark significant deviation in color. For example >25% = green and <15% is red
• Start your first data safari. Look at the first line
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Example pharmacy
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NEXT: PLOT FREQUENCY
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Pick a dimension
• Date/time/weekday/season• Age• Distance• Weight• Height• Etc…
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Medicine costs pp/y by age
1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 79 82 85 88 91 94 970
20
40
60
80
100
120
140
160
180
200
Medicijnkosten/jaar 2010
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Another perspective
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99101
-4
-2
0
2
4
6
8
10
12
14
Absolute verschil met voorloper
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NEXT: PLOT FREQUENCY VARIATION
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NEXT: REGULAR SAMPLING
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Pick a point of reference
• Usefull for streams of data• For instance compare situation at 8
o’clock every morning (traffic data)• Or January 1st for comparing years of
experience for members of parliament
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Example Dutch Parliament
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Another visualisation just for fun
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NEXT: MAKE IT PHYSICAL
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Physical map + heatmap
• Map data on the physical world• Colorcode things like frequency or
age
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NOW YOU TRY
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Example car database NL
• Registration date• Weight• Cilinders• Seats• Kilometer per liter• Price• Color• Brand• Serie
• Main fuel• Type (MPV, Station,
Sedan, etc…)• Numberplate• Mass• Insured
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Car color
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NEXT: COMBINE DATASOURCES
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LAST: CLEVER DIGGING
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Meeting notes Parliament
• A bit more content related exercise.• All meeting notes Dutch Parliament
since 1995• Who was there? What did they say?
How did they vote?
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99,998%
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Thank you!
Stephan Okhuijsen3 juni 2015
Itude – Datagraver - VOJN
@Steeph - @Datagraver