Description Usage Arguments Details Value Author(s) References See Also

Wrapper for selecting different animal movement methods.

This version uses just turn angles and step lengths to define the correlated random walk.

1 2 3 4 5 6 7 8 9 10 11 | ```
move(hypothesis = "crw", ...)
crw(agent, extent, stepLength, stddev, lonlat, torus = FALSE)
## S4 method for signature 'SpatialPointsDataFrame'
crw(agent, extent, stepLength, stddev,
lonlat, torus = FALSE)
## S4 method for signature 'SpatialPoints'
crw(agent, extent, stepLength, stddev, lonlat,
torus = FALSE)
``` |

`hypothesis` |
Character vector, length one, indicating which movement
hypothesis/method to test/use. Currently defaults to
'crw' (correlated random walk) using |

`...` |
arguments passed to the function in |

`agent` |
A |

`extent` |
An optional |

`stepLength` |
Numeric vector of length 1 or number of agents describing step length. |

`stddev` |
Numeric vector of length 1 or number of agents describing standard deviation of wrapped normal turn angles. |

`lonlat` |
Logical. If |

`torus` |
Logical. Should the crw movement be wrapped to the opposite
side of the map, as determined by the |

This simple version of a correlated random walk is largely the version that was presented in Turchin 1998, but it was also used with bias modifications in McIntire, Schultz, Crone 2007.

A SpatialPointsDataFrame object with updated spatial position defined by a single occurence of step length(s) and turn angle(s).

Eliot McIntire

Eliot McIntire

Turchin, P. 1998. Quantitative analysis of movement: measuring and modeling population redistribution in animals and plants. Sinauer Associates, Sunderland, MA.

McIntire, E. J. B., C. B. Schultz, and E. E. Crone. 2007. Designing a network for butterfly habitat restoration: where individuals, populations and landscapes interact. Journal of Applied Ecology 44:725-736.

SpaDES documentation built on May 19, 2017, 2:09 p.m.

Questions? Problems? Suggestions? Tweet to @rdrrHQ or email at ian@mutexlabs.com.

Please suggest features or report bugs in the GitHub issue tracker.

All documentation is copyright its authors; we didn't write any of that.

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.