ord_extract_cov: Extract covariance matrix from ordination scores with...

In barrel: Covariance-Based Ellipses and Annotation Tools for Ordination Plots

Extract covariance matrix from ordination scores with optional robust estimation

Description

Computes the covariance matrix of ordination scores, optionally using robust estimation.

Usage

ord_extract_cov(
  scores,
  axis1,
  axis2,
  weights = NULL,
  method = c("classic", "robust")
)

Arguments

scores	Data frame of ordination scores.
axis1	Name of first axis column.
axis2	Name of second axis column.
weights	Optional numeric vector of weights.
method	Covariance method: "classic" or "robust".

Value

2x2 covariance matrix.

barrel documentation built on Nov. 5, 2025, 7:40 p.m.