| TrajDirectionAutocorrelations {trajr} | R Documentation |
Direction autocorrelation
Description
Calculates the autocorrelation of the track for \Deltas ranging from 1
to deltaSMax, based on Shamble et al. (2017). trj must have a
constant step length (see TrajRediscretize) i.e. all segments
in the trajectory must be the same length. deltaS is specified in number of
segments. Call TrajDAFindFirstMinimum to locate the first local
minimum which may be used to characterise directional periodicity in a
trajectory (note that the first local minimum may not exist).
Usage
TrajDirectionAutocorrelations(trj, deltaSMax = round(nrow(trj)/4))
Arguments
trj |
The trajectory to calculate the directional autocorrelations for. |
deltaSMax |
Maximum delta s to calculate, default is |
Value
A data frame with class TrajDirectionAutocorrelations and 2
columns, deltaS and C. Plotting this object displays a graph
of the direction autocorrelation function, optionally with the location of
the first local minimum marked
References
Shamble, P. S., Hoy, R. R., Cohen, I., & Beatus, T. (2017). Walking like an ant: a quantitative and experimental approach to understanding locomotor mimicry in the jumping spider Myrmarachne formicaria. Proceedings of the Royal Society B: Biological Sciences, 284(1858). doi:10.1098/rspb.2017.0308
See Also
TrajDAFindFirstMinimum,
plot.TrajDirectionAutocorrelations