getMinBBox: Minimum-Area Bounding Box For A Set Of 2D-Points
In MartinHinz/shapAAR:

Calculates the vertices of the minimum-area, possibly oriented bounding box given a set of 2D-coordinates. Adapted from shotGroups package.

1	getMinBBox(xy)

`xy`	either a numerical (n x 2)-matrix with the (x,y)-coordinates of n >= 2 points (1 row of coordinates per point), or a data frame with either the variables `x`, `y` or `point.x`, `point.y`.

A list with the following information about the minimum-area bounding box:

`pts`	a (4 x 2)-matrix containing the coordinates of the (ordered) vertices.
`width`	width of the box.
`height`	height of the box.
`FoM`	figure of merit, i.e., the average side length of the box: (`width` + `height`) / 2.
`diag`	length of box diagonal.
`angle`	orientation of the box' longer edge pointing up as returned by `atan2`, but in degree.