Description Usage Arguments Value Author(s) References See Also Examples
A function to calculate the dynamic brownian motion variance for a movement track. It can be used by advanced programmers to program against.
1 2 | ## S4 method for signature '.MoveTrackSingle,numeric,numeric,numeric'
brownian.motion.variance.dyn(object, location.error, window.size, margin)
|
object |
An object of the Move-class, that can be used for variance calculation. It needs to be in a flat coordinate system. |
location.error |
A numeric vector with the location error. |
window.size |
The window size used for the variance calculation. |
margin |
The margin size used for variance calculation. |
An object of the type dBMvariance is returned
Bart Kranstauber
Kranstauber, B., Kays, R., LaPoint, S. D., Wikelski, M. and Safi, K. (2012), A dynamic Brownian bridge movement model to estimate utilization distributions for heterogeneous animal movement. Journal of Animal Ecology. doi: 10.1111/j.1365-2656.2012.01955.x
1 2 3 4 5 | data(leroy)
data2 <- spTransform(leroy[1:80,], CRSobj="+proj=aeqd +ellps=WGS84", center=TRUE)
err<-rep(23.5,n.locs(data2))
dBMvar <- brownian.motion.variance.dyn(data2, location.error=err, margin=13, window.siz=31)
dBMvar
|
Loading required package: geosphere
Loading required package: sp
Loading required package: raster
Loading required package: rgdal
rgdal: version: 1.2-10, (SVN revision 673)
Geospatial Data Abstraction Library extensions to R successfully loaded
Loaded GDAL runtime: GDAL 1.10.1, released 2013/08/26
Path to GDAL shared files: /usr/share/gdal/1.10
Loaded PROJ.4 runtime: Rel. 4.8.0, 6 March 2012, [PJ_VERSION: 480]
Path to PROJ.4 shared files: (autodetected)
WARNING: no proj_defs.dat in PROJ.4 shared files
Linking to sp version: 1.2-3
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
class : dBMvariance
features : 80
extent : -2084.331, 2085.19, -1763.593, 1763.915 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=aeqd +ellps=WGS84 +lon_0=-73.8734723 +lat_0=42.73388425
variables : 17
names : timestamp, eobs.battery.voltage, eobs.horizontal.accuracy.estimate, eobs.key.bin.checksum, eobs.speed.accuracy.estimate, eobs.start.timestamp, eobs.status, eobs.temperature, eobs.type.of.fix, eobs.used.time.to.get.fix, ground.speed, heading, height.above.ellipsoid, utm.easting, utm.northing, ...
min values : 2009-02-11 12:16:45, 3615, 3.33, 7099154, 2.39, 2009-02-11 12:14:59.000, A, 15, 3, 4, 0.02, 0.00, -5.3, 590119.2, 4730144, ...
max values : 2009-02-13 03:01:38, 3666, 66.56, 4219653549, 21.32, 2009-02-13 03:00:01.000, A, 35, 3, 108, 7.64, 359.79, 153.7, 594325.1, 4733640, ...
timestamps : 2009-02-11 12:16:45 ... 2009-02-13 03:01:38 Time difference of 2 days (start ... end, duration)
sensors : gps
indiv. data : eobs.fix.battery.voltage, manually.marked.outlier, visible, sensor.type, individual.taxon.canonical.name, tag.local.identifier, individual.local.identifier, study.name, study.timezone
indiv. value: 0 NA true gps Martes pennanti 74 Leroy Urban fisher GPS tracking Eastern Standard Time
unused rec. : 1071
margin : 13
window size : 31
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