Supplement 1. The WinBUGS code for analysis of movement paths.

File List

singlet.txt		WinBUGS code for model "Single", a single Random Walk. Size 2 KB
double.txt		WinBUGS code for model "Double", two Random Walks. Size 2 KB
double_covar.txt		WinBUGS code for model "Double with Covariates". Size 3 KB
double_switch.txt		WinBUGS code for model "Double Switch". Size 3 KB
switch_covar.txt		WinBUGS code for model "Switch with Covariates". Size 3 KB
switch_constrained.txt		WinBUGS code for model "Switch Constrained". Size 3 KB
triple_switch.txt		WinBUGS code for model "Triple Switch". Size 2 KB
HierSwitch.txt		WinBUGS code for hierarchical version of Switch model. Size 3 KB
simulasw.m		Matlab code for movement simulation. Size 5 KB
PPcheck.m		Matlab code for posterior predictive check. Size 7 KB
elk_data.txt		Movement data for four elk. Size 87 KB
simulated.txt		Movement data simulated with simulasw.m. Size 46 KB
allfiles.zip		All files together. Size 58 KB

Description

WinBUGS code was run on version 1.4 available at http://www.mrc-bsu.cam.ac.uk/bugs/winbugs/contents.shtml. We use the following generic script:

display('log')
check('directory/model_name.txt')
data('directory/data_file.txt')
compile(4)
inits(1, 'directory/filename1_ini.txt')
inits(2, 'switch/filename2_ini.txt')
inits(3, 'switch/filename3_ini.txt')
inits(4, 'switch/filename4_ini.txt')
gen.inits()
set(parameter_names)
over.relax('yes')
update(50000)
stats(*)
quantiles(*)
coda(*,switch/output)

See the WinBUGS manual for details on how to run the analysis. Matlab code was run on student version 6.5.