Week 9 – Time Series & Layering



Assignment1 – Summary






Week 8 – Project Update & Challenges (4)

(4) What are your challenges for Data Visualizations? 

What kinds of “things” can we see in a visualization? That’s the art of visualization design! We’re trying to plot the data such that the features we are interested in are obviously visible. The key principle is, don’t try to show everything at once. “Overview first, zoom and filter, then details-on-demand.” – UI Design scientists Ben Shneiderman. So we use interactive designs to allow users’ the ability and freedom to explore more.
1. “Data” – Methods have to deal with modern data formats and data sets: How can the technologies be adapted to deal with streaming and probably non i.i.d. data sets? How can specific data formats be visualized appropriately such as spatio-temporal data, spectral data, data characterized by a general probably non-metric dissimilarity measure, etc.? How can we deal with heterogeneous data and different credibility? How can the dissimilarity measure be adapted to emphasize the aspects which are relevant for visualization?

2. “Algorithms” Available techniques for specific tasks should be combined in a canonic way: How can unsupervised learning techniques be combined to construct good visualizations? For instance, how can we effectively combine techniques for clustering, collaborative filtering, and topic modeling with dimensionality reduction to construct scatter plots that reveal the similarity between groups of data, movies, or documents? How can we arrive at context dependent visualization?

3. “Users” – Visualization techniques should be ready to use for users outside the field: Which methods are suited to users outside the field? How can the necessity be avoided to set specific technical parameters by hand or choose from different possible mathematical algorithms by hand? Can this necessity be substituted by intuitive interactive mechanisms which can be used by non-experts?

4. “Theories”- Visualization techniques should be accompanied by theoretical guarantees: What are reasonable mathematical specifications of data visualization to shape this inherently ill-posed problem? Can this be controlled by the user in an efficient way? How can visualization be evaluated? What are reasonable benchmarks? What are reasonable evaluation measures?

Week 8 – Discussion(3) Pros & Cons

(3) Compare these two charts, pros & cons. 

Left: By Janice Joo
Data from: The Hechinger Report (via Read Write Web)
Right: By Janice Joo
Data from: Association of American Colleges and Universities
Break-Up Probability

Week 8 – Discussion(2) Interactive Visualization

(2) Find 3 interactive visualizations

I. NYTimes: “Snow Fall” Project
– “This defines the state of the art. It set a new standard for storytelling.”
– “This story sparks a lot of discussion about alternative forms of storytelling. Everyone was talking about it when it came out. It’s amazing the impact it had on on other newsrooms, even for non-visual journalists.”
2. ProPublica “Nursing Home Inspect
– “There is nothing else out there about this service. This project considered the data in a way that hasn’t been done before.”
– “The database is very accessible and valuable in itself. The project also included a list of of news reports that arose as a result of the project, making it very powerful when considering the kind of impact that can come out of this kind of reporting.”
3. The Washington Post “Homicides in the District
– “This story showed a great depth of original reporting. The quadratic analysis that broke it down into equal squares is the perfect way to approach data that involves continuous space.”
– “The use of proper GIS technique separates it from other crime sites, making it the best tool of its kind.”
– “The straightforward language was neutral and easy for people to digest. It was really well organized.” – “It is perfect in terms of having a strong hierarchy and guiding you through the story and showing you what’s important.”

Week 8 – Discussion(1) Colors

(1) Effects on different color palettes 

left: http://media.apps.chicagotribune.com/chicago-census/index.html

right: http://projects.nytimes.com/census/2010/explorer


Similar data sets mapped in different color palettes.

– What are the similarities & differences?

– What do these colors choices tell you?

So what about the following set of maps/videos?


VisPolitics – http://www.vispolitics.com/

Political MoneyBall – Wall Street Journal


Open Full View

More Reading >>

Tutorial on Network Visualization: Visualize and Analyze Networks in NodeXL and Gephi (by Prof. Denis Parra)


Dynamic networks in Gephi (quick tutorial to examine how the network evolve over time)

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