Computer code (R language) to derive the power-law tail probability density function and to simulate idelaized Lévy flight tracks.
Ecological Archives A017-025-S1.
File list (downloads)
Corey J. A. Bradshaw
School for Environmental Research
Institute od Advanced Studies
Charles Darwin University
Darwin, Northern Territory 0909, Australia
powerlawtail.txt -- R code needed to derive the power-law tail probability density function.
tracksim.txt -- R code needed to simulate tracks based on the power-law tail probability density function.
The powerlawtail.txt R code generates an idealized Lévy flight power-law tail probability density function based on µ = 2 and = 1. The code also provides a sampling 'check' function to determine µ from the relationship between the log of the step length frequencies and the log of the step lengths (corrected for the appropriate binning procedure as discussed in Appendix A and the main text of the paper). The tracksim.txt R code uses the idealized Lévy flight power-law tail probability density function to simulate animal movement tracks over 365 days assuming random turn angles after each step.
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