brownianTrack

Generates a random track with <code>nsteps</code> steps in <code>dim</code> dimensions.

Methods for analyzing (cell) motion in two or three dimensions.
Available measures include displacement, confinement ratio, autocorrelation,
straightness, turning angle, and fractal dimension. Measures can be applied to entire tracks,
steps, or subtracks with varying length. While the methodology has been developed for
cell trajectory analysis, it is applicable to anything that moves including animals,
people, or vehicles.
Some of the methodology implemented in this packages was described by:
Beauchemin, Dixit, and Perelson (2007) <doi:10.4049/jimmunol.178.9.5505>,
Beltman, Maree, and de Boer (2009) <doi:10.1038/nri2638>,
Gneiting and Schlather (2004) <doi:10.1137/S0036144501394387>,
Mokhtari, Mech, Zitzmann, Hasenberg, Gunzer, and Figge (2013) <doi:10.1371/journal.pone.0080808>,
Moreau, Lemaitre, Terriac, Azar, Piel, Lennon-Dumenil, and Bousso (2012) <doi:10.1016/j.immuni.2012.05.014>,
Textor, Peixoto, Henrickson, Sinn, von Andrian, and Westermann (2011) <doi:10.1073/pnas.1102288108>,
Textor, Sinn, and de Boer (2013) <doi:10.1186/1471-2105-14-S6-S10>,
Textor, Henrickson, Mandl, von Andrian, Westermann, de Boer, and Beltman (2014) <doi:10.1371/journal.pcbi.1003752>.

Johannes Textor

celltrackR

Motion Trajectory Analysis

Katharina Dannenberg

Jeffrey Berry

Gerhard Burger

Annie Liu

Mark Miller

Inge Wortel

brownianTrack function

<dl><dt>nsteps</dt>
<dd>desired number of steps (e.g. 10 steps generates a track with 11 positions).</dd>
<dt>dim</dt>
<dd>desired number of dimensions.</dd>
<dt>mean</dt>
<dd>stepwise mean drift per dimension; use 0 for an
unbiased Brownian motion and other values for Brownian motion with drift.</dd>
<dt>sd</dt>
<dd>stepwise standard deviation per dimension.</dd></dl>

Arguments

Simulate an Uncorrelated Random Walk — brownianTrack

<dl>

<dt>nsteps</dt>
<dd>desired number of steps (e.g. 10 steps generates a track with 11 positions).</dd>


<dt>dim</dt>
<dd>desired number of dimensions.</dd>


<dt>mean</dt>
<dd>stepwise mean drift per dimension; use 0 for an
unbiased Brownian motion and other values for Brownian motion with drift.</dd>


<dt>sd</dt>
<dd>stepwise standard deviation per dimension.</dd>

</dl>

brownianTrack: Simulate an Uncorrelated Random Walk

Description

Usage

Value

Arguments

Details