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Activity Number: 175
Type: Contributed
Date/Time: Monday, July 30, 2012 : 10:30 AM to 12:20 PM
Sponsor: Section on Statistical Computing
Abstract - #304511
Title: Visualization of Big Data Sets Using Package Bigvis
Author(s): Yue Hu*+ and Hadley Wickham
Companies: Rice University and Rice University
Address: 1717 Bissonnet St, Houston, TX, 77005, United States
Keywords: data visualization ; large data sets
Abstract:

Visualizing large data sets in R is a challenge. The problem of overplotting arises when using scatterplots to explore the correlation among variables or to identify clusters in the data, and there are memory and speed limitations of R. This talk proposes new methods of displaying large data sets and provides fast methods for binning and smoothing the data. Instead of visualizing each individual point, we visualize the densities, which can be efficiently obtained by binning and smoothing in any number of dimensions.

Our tool works with both base R data frames data and Revolution's proprietary XDF format. Revolution's RevoScaleR is a commercial product built on top of R that provides fast statistical analysis for data too big to fit into memory. Our preliminary works allow us to do exploratory analysis of data sets of up to 100 million observations, each plot taking under one minute to produce.


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