Jon S. Horne, Edward O. Garton, Stephen M. Krone, and Jessie S. Lewis. 2007. Analyzing animal movements using Brownian bridges. Ecology 88:2354–2363.

Supplement

Visual Basic source code containing the algorithms described in this paper.
Ecological Archives E088-142-S1.

Copyright

Authors
File list (downloads)
Description

Author(s)

Jon S. Horne
Department of Fish and Wildlife
University of Idaho
Moscow, ID USA
E-mail: horn8262@uidaho.edu

Edward O. Garten
Department of Fish and Wildlife
University of Idaho
Moscow, ID USA
E-mail: ogarton@uidaho.edu

Stephen M. Krone
Department of Mathematics
University of Idaho
Moscow, ID USA
E-mail: krone@uidaho.edu

Jessie S. Lewis
Department of Fish and Wildlife
University of Idaho
Moscow, ID USA
E-mail: lewi1508@uidaho.edu

File list

All files at once

BBridgeCode.zip -- zip file containing Visual Basic executable, source code, and example input file.

Individual files

BrownianBridgeExecutable.exe – Executable Visual Basic program
ProjBrownianBridge.vbp.txt – Source code for Visual Basic program
ProjBrownianBridge.vbw.txt – Source code for Visual Basic program
FrmBBAnalysis.frm.txt – Source code for Visual Basic program
FrmGridExtent.frm.txt – Source code for Visual Basic program
FrmOpenFileBB.frm.txt – Source code for Visual Basic program
FrmSaveASBrownBridge.txt – Source code for Visual Basic program
Mod1DMinimization.bas.txt – Source code for Visual Basic program
ModFileManagement.bas.txt – Source code for Visual Basic program
ModPublicVariablesBB.bas.txt – Source code for Visual Basic program
ExampleInput.txt  – Example input file

Description

BrownianBridgeExeecutable.exe calculates the utilization distribution (i.e., probability function) based on temporally explicit location data. Algorithms are described in the original paper. The user loads a location file containing tab-delimited columns representing the x-coordinate, y-coordinate, and time of each location. The input file should have column headings such as “x-coordinate”, “y-coordinate” and “RunningClock”.  An example input data file, ExampleInput.txt, is available from the file list. Output grid is a text file containing x and y coordinates of the grid along with associated probability-of-occurrence at that grid location.