Models and Autonomous Processes

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Models and Autonomous Processes

• CS 7450 - Information Visualization
• November 21, 2000

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Data Forms

• For most of what weve examined this semester,
  the data was static, available a priori and
  finite
• Consider data being generated by some kind of
  simulator or process
• Potentially infinite number of potential data
  items

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Examples

• Mathematical model that can generate many
  different data points
• Experiment with independent and dependent
  variables
• Physical manufacturing process with a set of
  parameters that can be modified, then a variety
  of outputs (stresses, qualities, etc.) are
  observed

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Book Example

• Filament that has four parameters (X1, X2, X3,
  X4) controlled by manufacturer
• Choices of those then exhibits set of four
  stresses (S1, S2, S3, S4)

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Functions

• Each stress can be calculated by a complex
  equation of parameters
• S3 35.7X1 29.1X23 67.8X32 92.4X42
  54.2X13 13.3

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Objective

• Would like to visualize resultant stress values
  when we change input parameter values
• Dynamic query-ish interface for exploration
• Allows designer to look at input space and see
  what happens when values change

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Objective 2

• How about backwards?
• Wouldnt it be neat to see sets of resultant
  stress values, and then be able to find out which
  parameters make those
• Idea Explore the output space (which is what
  you really care about) then see what you need to
  do to get there

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Challenge

• Unfortunately, complex models can be too
  computationally expensive to do dynamic query-ish
  displays on the fly
• Simply takes too long to calculate many output
  stress values

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Compromise

• Pre-calculate a set of 400 (e.g.) combinations of
  parameters and get the corresponding output
  stresses
• Basically, manually populate the data space with
  enough examples to make it interesting

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Influence Explorer

• Interactive system to explore these kinds of
  relationships
• Created to help designers experiment with space
  of solutions and parameters

Tweedie, Spence, Dawkes Su 95
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Depiction
X2
S2
X1
S1
Input params
Result stresses
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Interactive Query
Choose outputs then see what it takes
S2
X2
S1
X1
Result stresses
Input params
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Alternative
Select range of focus via some form of clamping
input selector
S2
S1
Result stresses
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Problem

• These example showed two-dimensional data
• We can have much higher dimensionality in our
  data sets

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Solution
Utilize stacked histograms to represent different
variables
Parameters
Performances
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Interaction

• User can then interactively select particular
  regions of either the parameters or performances
  and see where the corresponding values are

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Interface
Selecting different regions of performance S4 to
see where other values come from
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(No Transcript)
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Alternate View
Customers preferred limits for performances are
entered. Those matching 4 red 3 black 2 dark
gray 1 light gray
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Corresponding Parameters
Shows the design parameters that fit the
desired outputs
Video
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Others

• Other types of autonomous processes exist
• Software visualization (Saw last time)
• Software agents
• Financial processes

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References

• Spence text
• All referred to papers and web sites

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Assignment Handback

• Most people used tool as form of WWW
  links/PowerPoint
• What saw demoed?
• What tool facilitated?
• Easier?

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Problems

• Closing before file saved
• Should put all images in same directory

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Class Suggestions
Undo Better paste Cant link to individ in
group Animation, dynamics ÿ char appears Overview
map Templates Gridlines Snap navigation Bread
crumbs, book- marks, history Coordinates Text
search Copy-paste inconsistent Ask to save on quit
Straight lines Better input devices Side edit
view Zoom levels Hand/arrow mode
confusion Search for objects, text Put
limitations on infinite zooming in Pct done
indicator on save Lack of context Mode to
highlight all hyperlinks When black bg, cant
find cursor
Composite movement (zoom-pan-zoom) Go home
didnt work Multiple links from one
object Object/text editing
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My Observation

• Zooming methodology with mouse in current tool
  just doesnt work well
• Alternate Pan-zoom as moves, hold button down
  to zoom in
• 1 Pan
• 2 Zoom in as button held down
• 3 Zoom out