JSM 2012 Home

JSM 2012 Online Program

The views expressed here are those of the individual authors and not necessarily those of the JSM sponsors, their officers, or their staff.

Online Program Home

Abstract Details

Activity Number: 41
Type: Contributed
Date/Time: Sunday, July 29, 2012 : 2:00 PM to 3:50 PM
Sponsor: Section on Statistics and the Environment
Abstract - #306565
Title: Comparing Changes in Population Density via Deformation Metrics
Author(s): Miriam Hodge*+
Companies: University of Canterbury
Address: University of Canterbury, Christchurch, _, 8140, New Zealand
Keywords:
Abstract:

Studies of animal populations typically involve collecting observations that have both a spatial and a temporal context. For example, observations from a long term study of animal populations across a heterogeneous area will have spatial and temporal references. Each observation records the animal density, the geographic location and the time point. Non-parametric regression is a useful analysis tool to describe the population density mapped to the study area in a given year. The result is a series of surfaces, one for each time period, which collectively describe the population change over time. We present a novel method to compare the surface shape as a way of describing change. We compare these surfaces using metrics developed for comparing shapes in medical imagery. Metrics based on deformation, a technique developed for anatomical surfaces, are adapted to compare non-parametric regression surfaces.


The address information is for the authors that have a + after their name.
Authors who are presenting talks have a * after their name.

Back to the full JSM 2012 program




2012 JSM Online Program Home

For information, contact jsm@amstat.org or phone (888) 231-3473.

If you have questions about the Continuing Education program, please contact the Education Department.