Render a brain atlas with default snapshot styling

Builds a minimal, deterministic plot of a ggseg_atlas: every region filled by its label, no legend, and ggplot2::theme_void(). This is the canonical construction used across the ggsegverse for visual-regression (vdiffr) snapshots, so that every atlas is rendered the same way and a stray legend, axis, or title cannot creep into a snapshot. It doubles as a quick way to preview an atlas.

Usage

brain_test_plot(atlas, position = NULL, na.value = "grey")

Arguments

atlas

A ggseg_atlas object, such as dk() or aseg().

position

A ggplot2 position adjustment arranging the brain views. Defaults to position_brain(hemi ~ view) for cortical atlases and position_brain(. ~ view) for slice-based atlases (subcortical, cerebellar, tract), whose views already contain both hemispheres.

na.value

Fill colour for regions with no palette entry. Defaults to "grey".

Value

A ggplot2::ggplot() object.

Details

The atlas palette is applied with ggplot2::scale_fill_manual() when it is present; atlases without a palette fall back to the default ggplot2 fill scale.

See also

geom_brain()

Examples

brain_test_plot(dk())