Adds custom annotations to a single panel on the ggbrain plot

Usage

annotate_slice(slice_index = NULL, ...)

Arguments

slice_index: the slice number to which this annotation is added. These are numbered in the wrapping order from patchwork::wrap_plots, which will normally go from top-left to bottom-right.
...: Additional parameters passed to ggplot2::annotate such as label or geom

Value

a ggb object with the relevant annotations field and an action of "add_annotations"

Details

For annotation coordinates such as x, y, or xmin, you may pass in a number. In this case, the value specifies the pixel position along the relevant axis (e.g., x=26). In addition, convenience values of 'left', 'right', and 'middle' can be used for the x axis, and 'top', 'bottom', and 'middle' for the y axis.

Finally, or 'q[1-100]' can be used to look up the quantile-based positions along the relevant axis. For example, x="q25" would position the annotation at the 25% mark along the x axis.

N.B. This function only adds a single annotation on a single panel!