variogram: Empirical Variograms

In TobieSurette/gulf.stats: Southern Gulf of St Lawrence Metadata

Empirical Variograms

Description

Functions to calculate empirical variograms and fit variogram models to data.

Usage

variogram(x, ...)

## Default S3 method:
variogram(
  x,
  z,
  lag,
  max.distance,
  mean.lag = TRUE,
  distance.units,
  response.units,
  trim,
  fit = TRUE,
  ...
)

## S3 method for class 'scsset'
variogram(
  x,
  category,
  variable,
  weight = FALSE,
  lag = 3,
  max.distance = 75,
  distance.exponent = 1,
  ...
)

## S3 method for class 'variogram'
variogram(x, h)

Arguments

x	Data observations, coordinates or a distance matrix.
z	Vector of data observations.
distance.exponent	Positive numeric value specifying the exponent of the distance metric.
h	Lag distances.
model	Character string specifying a variogram function type.
nugget	Logical value specifying whether the variogram model includes a nugget (i.e. zero-lag) variance component.
inits	Initial parameter values.

Methods (by class)

• variogram(default): Calculate empirical variogram.

• variogram(scsset): Calculate empirical variogram for snow crab survey data.

• variogram(variogram): Evaluate variogram at specified distances.

TobieSurette/gulf.stats documentation built on Jan. 4, 2023, 4:19 p.m.