ctmm (version 0.2.9)

mean.variogram: Compute a number-weighted average of variogram objects

Description

This function takes a list of variogram objects and calculates its number-weighted average variogram.

Usage

## S3 method for class 'variogram':
mean(x,...)

Arguments

x

A variogram object or list of such objects to be averaged.

...

Additional variograms if specified individually.

Value

• Returns a variogram object (class variogram) which is a dataframe containing the lag, the semi-variance estimate at that lag, and the approximate degrees of freedom associated with the semi-variance estimate.

References

C. H. Fleming, J. M. Calabrese, T. Mueller, K.A. Olson, P. Leimgruber, and W. F. Fagan. 2014. From fine-scale foraging to home ranges: A semi-variance approach to identifying movement modes across spatiotemporal scales. The American Naturalist, 183(5):E154-E167.

See Also

plot.variogram, variogram.

Examples

# Load package and data
library(ctmm)
data(buffalo)

# Calculate a list of variograms for all similar individuals in the dataset
# the 4th buffalo has a different sampling rate
svflist <- lapply( buffalo[-4] , variogram )
# alternatively, we could variogram all at coarsest scale with variogram option dt

# Calculate the average variogram
meansvf <- mean(svflist)

# Plot the mean variogram
plot(meansvf)