#### Filter Results:

- Full text PDF available (12)

#### Publication Year

2009

2014

- This year (0)
- Last 5 years (9)
- Last 10 years (13)

#### Publication Type

#### Co-author

#### Journals and Conferences

#### Key Phrases

Learn More

- Dang Tuan Nhon, Leland Wilkinson, Anushka Anand
- IEEE Transactions on Visualization and Computer…
- 2010

An ongoing challenge for information visualization is how to deal with over-plotting forced by ties or the relatively limited visual field of display devices. A popular solution is to represent local data density with area (bubble plots, treemaps), color(heatmaps), or aggregation (histograms, kernel densities, pixel displays). All of these methods have at… (More)

- Anushka Anand, Leland Wilkinson, Dang Tuan Nhon
- IEEE VAST
- 2012

An essential element of exploratory data analysis is the use of revealing low-dimensional projections of high-dimensional data. Projection Pursuit has been an effective method for finding interesting low-dimensional projections of multidimensional spaces by optimizing a score function called a projection pursuit index. However, the technique is not scalable… (More)

- Dang Tuan Nhon, Leland Wilkinson
- PacificVis
- 2014

A scatterplot displays a relation between a pair of variables. Given a set of v variables, there are v(v− 1)/2 pairs of variables, and thus the same number of possible pairwise scatterplots. Therefore for even small sets of variables, the number of scatterplots can be large. Scatterplot matrices (SPLOMs) can easily run out of pixels when presenting… (More)

- Dang Tuan Nhon, Anushka Anand, Leland Wilkinson
- IEEE Transactions on Visualization and Computer…
- 2013

We introduce a method (Scagnostic time series) and an application (TimeSeer) for organizing multivariate time series and for guiding interactive exploration through high-dimensional data. The method is based on nine characterizations of the 2D distributions of orthogonal pairwise projections on a set of points in multidimensional euclidean space. These… (More)

- Leland Wilkinson, Anushka Anand, Dang Tuan Nhon
- KDD
- 2011

We introduce a classifier based on the L-infinity norm. This classifier, called CHIRP, is an iterative sequence of three stages (projecting, binning, and covering) that are designed to deal with the curse of dimensionality, computational complexity, and nonlinear separability. CHIRP is not a hybrid or modification of existing classifiers; it employs a new… (More)

- Anushka Anand, Leland Wilkinson, Dang Tuan Nhon
- 2009 Ninth IEEE International Conference on Data…
- 2009

We introduce a mathematical framework, based on the L-infinity norm distance metric, to describe human interactions in a visual data mining environment. We use the framework to build a classifier that involves an algebra on hyper-rectangles. Our classifier, called VisClassifier, generates set-wise rules from simple gestures in an exploratory visual GUI.… (More)

- Anushka Anand, Leland Wilkinson, Dang Tuan Nhon
- IEEE VAST
- 2011

Projection Pursuit has been an effective method for finding interesting low-dimensional (usually 2D) projections in multidimensional spaces. Unfortunately, projection pursuit is not scalable to highdimensional spaces. We introduce a novel method for approximating the results of projection pursuit to find class-separating views by using random projections.… (More)

- Dang Tuan Nhon, Anushka Anand, Leland Wilkinson
- ISVC
- 2012

Choices in music express our taste and personality. Different people have different collections of favorite songs. The explosive growth of digital media makes it easier to access any songs we want. Consequently, finding the songs best fit to our tastes becomes more challenging. Existing solutions record user patterns of listening to music, then make… (More)

- Dang Tuan Nhon, Leland Wilkinson
- IEEE Transactions on Visualization and Computer…
- 2014

Scagnostics (Scatterplot Diagnostics) were developed by Wilkinson et al. based on an idea of Paul and John Tukey, in order to discern meaningful patterns in large collections of scatterplots. The Tukeys' original idea was intended to overcome the impediments involved in examining large scatterplot matrices (multiplicity of plots and lack of detail).… (More)

- Dang Tuan Nhon, Leland Wilkinson
- ISVC
- 2013

The analysis of different time series is an important activity in many areas of science and engineering. In this paper, we introduce a new method (feature extraction for time series) and an application (TimeExplorer) for similarity-based time series querying. The method is based on eleven characterizations of line graphs presenting time series. These… (More)