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

DescriptionWinBUGS 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.