rplot_impl.md
=============

Object managing plots produced by R.  Is a `setting_user`.

get
---

	some_rplot get ratio

Render and emit the SVG associated with the current settings of the plot
`some_rplot` with a floating-point aspect ratio `ratio`.

available_plots
---------------

	some_rplot available_plots

List the currently valid arguments for `set_type`.

copy
----

	some_rplot copy imposter

Create a new rplot `imposter` and copy all settings from `some_rplot` to `imposter`

set_type
--------

	some_rplot set_type script.R

Set the R script that will be used to render `some_rplot` to be `script.R`.

get_type_icon
-------------

	some_rplot get_type_icon script.R

Emit the SVG for a representation of the type of plot produced by `script.R`.


lsave_as
--------

	some_rplot lsave_as file...

Render and write to the file `file` the SVG associated with the current settings
of the plot `some_rplot`.


get_setting_levels
------------------

	some_rplot get_setting_levels name

If an available setting `name` of the plot `some_rplot` has a limited range of
values that are meaningful, emit a list of those values.