neighbor_quantifier: Calculate statistics around points

In kstierhoff/atm: Functions Used for the Analysis of Acoustic-Trawl Method (ATM) Survey Data

Calculate statistics around points

Description

Calculate statistics around points

Usage

neighbor_quantifier(
  small.file,
  large.file,
  variable = NULL,
  method = "sp",
  crs = 4326,
  radius = 20,
  length = 100,
  plot.fig = TRUE,
  save.fig = TRUE,
  fig.name = NULL
)

Arguments

small.file	A data frame containing points around which statistics are computed; must contain 'lat' and 'long'.
large.file	A data frame containing points upon which statistics are computed; must contain 'lat' and 'long'.
variable	Column name upon which to compute statistics
method	Either 'sp' to compute spatial statistics in Cartesian space, using the sp package, or 'sf' to compute statistics in geographic space using the sf package.
crs	Coordinate reference system for using the 'sf' method (default is 4326 for WGS84 projection)
radius	Length of radius (in nautical miles) around points in small.file used to compute spatial polygons
length	Length of vector used to create polygon nodes
plot.fig	Plot results (T/F)
save.fig	Save figure (T/F)
fig.name	Name of figure.

Value

A data frame with the number (n), mean, and standard deviation of the variable within each polygon.

kstierhoff/atm documentation built on June 10, 2025, 8:55 a.m.