Link the observations and the panel with a triangle

Link the observations and the panel with a triangle

Usage

mark_triangle(..., orientation = "plot", .element = NULL)

Arguments

...

<dyn-dots> A list of formulas, where each side of the formula should be an integer or character index of the original data, or a range_link() object defining the linked observations. Use NULL to indicate no link on that side. You can also combine these by wrapping them into a single list(). If only the left-hand side of the formula exists, you can input it directly. For integer indices, wrap them with I() to use the ordering from the layout. You can also use waiver() to inherit values from the other group.

orientation

A single string, either "plot" or "observation", indicating the base of the triangle.

.element

An element_polygon() object. Vectorized fields will be recycled to match the total number of groups, or you can wrap the element with I() to recycle to match the drawing groups.

• When orientation is "plot", the drawing groups typically correspond to the number of observations.

• When orientation is "observation", the drawing groups usually match the defined groups, but will differ if the defined group of observations is separated and cannot be linked with a single triangle. In this case, the number of drawing groups will be larger than the number of defined groups.