mesh_line: Draw line segments between regional meshes
In japanmesh: Functions for the Japanese Regional Mesh Codes ('JIS X 0410')

If mesh and mesh_to are both vectors, the line between mesh and mesh_to is drawn (using Bresenham's line algorithm). If mesh is a list, The path lines for each element in the mesh will be drawn.

1	mesh_line(mesh, mesh_to, close = FALSE, skip_na = FALSE)

`mesh`	A `mesh` vector or a list of `mesh` vector.
`mesh_to`	A `mesh` vector.
`close`	Should the path of each element be closed when `mesh` is a list?
`skip_na`	Should skip the `NA` mesh and connects the paths? `FALSE` by default.