Read the canonical attributes of a heading frame

Accessors for the metadata a [headings_frame] carries. They also work on a plain data frame, returning sensible defaults, so any function can read the display convention without assuming the input is classed.

Usage

hf_display(x)

hf_heading_col(x)

hf_colour_col(x)

hf_color_col(x)

hf_coords(x)

Arguments

x

A `headings_frame` or plain data frame.

Value

`hf_display()` a [circ_display()] object; `hf_heading_col()` / `hf_coords()` a string; `hf_colour_col()` a string or `NULL`.