This function starts the interactive
to (optionally) create and/or modify a nested hierarchy.
It is possible to supply a character vector from which the
hierarchy can be interactively built. Once this has been done,
it is possible to modify and export the resulting hierarchy.
hier_app(x = hier_create(), ...)
a character vector containing nested levels or
an object generated with
The app can return a hierarchy object (either
data.frame or a tree-based object)
Another option is to supply an already existing hierarchy object. In this case, it is possible to modify the existing object in the app.