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Find thresholds of diffusive spread

Source: R/find_thresholds.R
find_thresholds.Rd

Find thresholds of diffusive spread and get a list of potential jumps. This function identifies spatial discontinuities in the distribution of species’ occurrences between the putative limit of the continuous, diffusive spread (i.e., the invasion front) and outlying occurrences. This function must be applied after attribute_sectors() and before find_jumps().

Usage

find_thresholds(dataset, gap_size = 15, negatives = TRUE)

Arguments

dataset

A dataset to be processed, output of attribute_sectors()

gap_size

Distance between the invasion front and a positive point necessary for it to be considered a jump, in kilometers (default: 15)

negatives

Should the function verify that negative surveys were found in the spatial discontinuities? (default: TRUE)

Value

Two tables: one table Thresholds containing the threshold per year and sector, one table potJumps containing the list of potential jumps for find_jumps()

Examples

if (FALSE) { # \dontrun{
thresholds <- find_thresholds(dataset)
} # }