spectral_spews

The input matrix or a list of matrices.

The range of values (in proportion) to 
use for the computation of the spectral density ratio.
For example, for the lowest 20
c(0, .2). See also the Details section.

sdr_low_range

The range of values (in proportion) to 
use for the computation of the spectral density ratio. For example, for 
the higher 20
c(.8, 1). See also the Details section.

sdr_high_range

quiet

Computation of spatial early warning signals based on spectral
 properties.

Tools to compute and assess significance of early-warnings signals (EWS) of ecosystem degradation on raster data sets. EWS are metrics derived from the observed spatial structure of an ecosystem -- e.g. spatial autocorrelation -- that increase before an ecosystem undergoes a non-linear transition (Kefi et al. (2014) <doi:10.1371/journal.pone.0092097>).

spectral_spews: (DEPRECATED) Spectrum-based spatial early-warning signals.

Description

Usage

Arguments

Details