indicator_moran: (DEFUNCT) Moran's Index at lag of 1
Description
This functions computes the Moran's spatial correlation index
(with lag one). It also computes a null value obtained by randomizing
the matrix.
Usage
indicator_moran(input, subsize = 1, nulln = 99)
Value
A list (or a list of those if input is a list of matrix
object) of:
`value`: Spatial autocorrelation of the matrix
If nulln is above 2, then the list has the following additional
components :
`null_mean`: Mean autocorrelation of the null distribution
`null_sd`: SD of autocorrelation in the null distribution
`z_score`: Z-score of the observed value in the null distribution
`pval`: p-value based on the rank of the observed autocorrelation
in the null distribution.
Arguments
input
An matrix or a list of matrix object. It should
be a square matrix
subsize
logical. Dimension of the submatrix used to coarse-grain the
original matrix (set to 1 for no coarse-graining).
nulln
Number of replicates to produce to estimate null
distribution of index (default: 999).
References
Dakos, V., van Nes, E. H., Donangelo, R., Fort, H., &
Scheffer, M. (2010). Spatial correlation as leading indicator of
catastrophic shifts. Theoretical Ecology, 3(3), 163-174.
Legendre, P., & Legendre, L. F. J. (2012). Numerical Ecology.
Elsevier Science.