Plot Connectivity Matrix or Circle — eegPlotConnectivity • PhysioEEG

Visualizes EEG connectivity as either a heatmap (matrix) or a circular connectivity plot (circle). The connectivity matrix can be provided directly or read from metadata(x)$connectivity$matrix.

Usage

eegPlotConnectivity(
  x,
  method = c("heatmap", "circle"),
  matrix = NULL,
  threshold = 0,
  labels = NULL,
  palette = "RdBu"
)

Arguments

x: A PhysioExperiment object with EEG data.
method: Display method: "heatmap" for a correlation/connectivity matrix heatmap or "circle" for a circular connectivity diagram.
matrix: Numeric matrix of connectivity values. If NULL, reads from metadata(x)$connectivity$matrix.
threshold: Numeric; only show connections above this value (default: 0).
labels: Character vector of channel labels. If NULL, uses row/column names of the matrix or channel labels from colData.
palette: Character name of the diverging color palette (default: "RdBu").

Value

A ggplot2 object.

Examples

if (requireNamespace("ggplot2", quietly = TRUE)) {
  mat <- matrix(runif(16), 4, 4)
  diag(mat) <- 1
  pe <- make_eeg(n_time = 1000, n_channels = 4, sr = 250)
  eegPlotConnectivity(pe, method = "heatmap", matrix = mat)
}