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Create a minimum spanning tree from geographic coordinates of points and extracted data.

Source: R/prepare_mst.R
prepare_mst.Rd

Take a dataframe of points points and create a minimum spanning tree between pixel coordinates, using edge costs that are a combination of geographic distances and distances between points by additional_variable_cols values. For additional details on minimum spanning tree creation see igraph::mst().

Usage

prepare_mst(
  points,
  additional_variable_cols = c("depth_standard"),
  mst_alpha = 0.5,
  hex_resolution = 12
)

Arguments

points

sf data.frame. Holds values for pixel geometries and additional_variable_cols

additional_variable_cols

character vector. Names of the columns to extract additional (non-geometric) data from for cost weighting.

mst_alpha

float numeric. Weighting applied to additional_variable_cols distance in edge cost weighting when combining with geographic distances. (1 - alpha) weight is applied to the geographic distance. Default = 0.5 (same weight for additional_variable_cols and geographic distances).

hex_resolution

integer. H3 hex resolution of pixels. Default = 12.

Value

igraph::mst Minimum spanning tree object.