W08 Data Visualisation Flashcards

1
Q

Why visualize?

A

explorative analysis

  • manual datamining
  • find and see connections

decision support and management information
-quick overview of relevant trends and patterns

presentation and argumentation

  • underline arguments with quantiative data
  • ethics!
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2
Q

Good Visualization

A
  • all relevant data (no more)
  • think content, not presentation
  • no distortion
  • make large data understandable
  • enable comparisons
  • layer details from overview to finer points
  • clear purpose
  • integrated in context of representation

substance + data analysis+ design

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3
Q

3 steps for effective visualization

A

formulate question
gather and analyze data
apply visual representation

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4
Q

Distorting data

A
  • y -axis scale
  • modify base line
  • switch aggregation level
  • areas for one-dimensional data
  • visual effects

Deception and ethics!!

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5
Q

Histogram - beware of?

A

bin size!

Detail - Distribution - detail deprivation

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6
Q

Pie Charts - beware of?

A

Proportions!

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7
Q

Images and Quantities

A
direct labels (axes)
encoding (color and shadow)
self-representation (known objects)
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8
Q

maximize information content

A
  • smallest effective difference
  • minimize ink
  • avoid chart junk
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9
Q

Use of Color

A

Sequential -nice
diverging - ok
qualitative - meh

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10
Q

Use negative space

A

invert colors

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11
Q

Scaling of Graph

A
  • axes min and max
  • aspect ratio
  • similarity to others
  • beware of sacrificing comparabiltiy to understandbility
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12
Q

Show transformations?

A

multiples and parellelism

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13
Q

Infographics

A

tell a story through

  • data visualization
  • text
  • images
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14
Q

Visual Story Telling

A

Introduction -why?
Main Event -what? aha
conclusion follow up?

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15
Q

Media Formats

A

static to interactive

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16
Q

Infographics

A
  • accurate
  • key message
  • visualize if possible
  • minimize text
  • be data transparent
17
Q

Animated and Interactive Visualizations

A
  • filter and aggregate on the fly

- web-based presentations