# Shared Flashcard Set

## Details

DataViz2017part1
Flashcards for exam one of data visualization
65
Other
02/14/2017

Term
 [image]
Definition
 Line Graph
Term
 [image]
Definition
 Cross tab
Term
 [image]
Definition
 Bar graph
Term
 [image]
Definition
 Trellis Display / Small multiples
Term
 When do you use horizontal bars vs vertical bars in a bar graph?
Definition
 When the labels are long
Term
 [image]
Definition
 Stacked bar chart
Term
 [image]
Definition
 Dot plot
Term
 When do you use a dot plot?
Definition
 When analyzing values that are irregularly spaced in time
Term
 [image]
Definition
Term
 What makes a radar graph different from a spider chart?
Definition
 On a radar graph, all axes are different levels of the same variable. On a spider chart, each axis is a different variable.
Term
 When do you use a radar graph?
Definition
 When you want to represent data across the cyclical nature of time.
Term
 [image]
Definition
 Spider chart
Term
 [image]
Definition
 Heat map
Term
 [image]
Definition
 Box plot
Term
 When would you use an animated scatterplot?
Definition
 When you want to see how two quantitative variables change over time
Term
 What angle (in degrees) are people best able to interpret sloped data in a line graph?
Definition
 45 degrees
Term
 What type of y-axis scale (other than normal, linear) could be used to show changes in rate?
Definition
 Log scale
Term
 [image]
Definition
 Cycle plot
Term
 [image]
Definition
 Pareto chart
Term
 [image]
Definition
 Bump chart
Term
 [image]
Definition
 Bump chart
Term
 [image]
Definition
 Deviation analysis
Term
 [image]
Definition
 Histogram
Term
 [image]
Definition
 Frequency plot
Term
 [image]
Definition
 Strip plot
Term
 [image]
Definition
 Stem and leaf plot
Term
 What is the difference between a crosstab and a scatterplot matrix?
Definition
 The scatterplot matrix usually has every variable listed on each axis, so each bivariate relationship is actually shown twice.: A1 A2       A1      A2   Crosstabs do not have that redundancy.                   B1 B2 B3 A1 A2 A4
Term
 [image]
Definition
 Multiple Concurrent views
Term
 How many variables is hypervariate data?
Definition
 More than three
Term
 What is a glyph?
Definition
 A graphical object that represents a data case. A mark tha can be varied in N ways
Term
 [image]
Definition
 Chernoff face
Term
 Name 3 ways to display hypervariate data
Definition
 (Non-exhaustive) Excel sheet star charts chernoff faces small multiples scatterplot matrix (with size and color encodings) glyphs table lens
Term
 [image]
Definition
 Table lens
Term
 [image]
Definition
 Table lens
Term
 [image]
Definition
 Mosaic plot
Term
 [image]
Definition
 Parallel coordinates
Term
 How does viz amplify cognition?
Definition
 Increases memory and processing resources available Reduces search for information Enhances pattern recognition Enables perceptual inference Encodes info into manipulable medium
Term
 What is semiotics?
Definition
 Study of symbols and how they convey meaning
Term
 What is psychophysics
Definition
 Applying physics to measuring human perceptual systems
Term
 What are the two stages of visual perception?
Definition
 Early, pre-attentive, parallel Sequential, goal-directed
Term
 What are the six Gestalt principles?
Definition
 Symmetry Continuity Proximity Similarity Common fate Closure
Term
 Difference between luminance and brightness
Definition
 Luminance is measured amount of light Brightness is perceived amount of light
Term
 3 dimensions of color in HVS model
Definition
 Hue (color) Value (brightness) Saturation (lightness/darkness)
Term
 Max. recommended number of diffrent colors used to encode categories of info
Definition
 12
Term
 Should you use a rainbow color scale to do ____.
Definition
 Probably not! Dr B says NO
Term
 Should you use blue in large areas or thin lines? (Pick one)
Definition
 Large areas.
Term
 Should you use red and green in the central field of view or the periphery?
Definition
 Central
Term
 For large regions, should you use saturated or unsaturated colors?
Definition
 Unsaturated
Term
 What is the best visual encoding to use for any type of data (quantitative, nominal, ordinal)?
Definition
 Position
Term
 Are people better at comparing different areas or different volumes?
Definition
 Areas
Term
 Is color hue best for encoding quantitative, ordinal, or nominal data?
Definition
 Nominal
Term
 [image]
Definition
 Calendar events on a timeline
Term
 [image]
Definition
 Life lines
Term
 [image]
Definition
 Cluster display
Term
 [image]
Definition
 Connected scatterplot
Term
 [image]
Definition
 Calendar based heat map
Term
 [image]
Definition
 Spiral graph example.
Term
 [image]
Definition
 Theme River
Term
 What is the degree of a vertex?
Definition
 The number of edges connected to it
Term
 How is a tree different from a more general graph?
Definition
 Edges are directed No cycles Specially designated "root" vertex
Term
 What are three challenges in graph visualization?
Definition
 Layout/positioning Change in focus/Naviation/Interaction Scale
Term
 Name 5 ways network nodes can be encoded
Definition
 Size Shape Color/Texture Location Label
Term
 Name 4 ways network edges can be encoded
Definition
 Color Weight Label Form
Term
 Name the 6 aesthetic considerations of network graphs
Definition
 Minimize crossings Minimize longest edge Make all edge lengths the same Minimize total edge length Minimize area Minimize total bends
Term
 What is network visualization nirvana?
Definition
 Every node visible Degree of node easily countable Follow every link from source to destination Clusters and outliers are visible
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