rc: Plot response curves
In mtalluto/mbm: Multifaceted Biodiversity Modelling

Produce a plot of a response curve from an MBM object, with some sensible defaults. If a response curve was not generated when the model was fit, teh default is to try to make an empirical curve from the fits.

rc(x, missing_action = c("error", "empirical", "fit"),
  rc_name = "rc_distance", col_pt = "#666666", col_line = "#ce5336",
  col_polygon = paste0(col_line, "66"), cex_pt = 0.4, add = FALSE,
  ...)

`x`	An MBM object
`missing_action`	What to do if no response curve was fit with the model. `empirical` will make an empirical curve from the model fits. `fit` will fit a response curve, which can be slow. `error` (the only implemented option) quits with an error message.
`rc_name`	A character string, integer, or NA. If a string or integer, the name or index of the response curve to fit. If NA, (not yet implemented), will attempt to find all response curves and plot them all.
`col_pt`	Point color, if NA points will not be plotted.
`col_line`	Line color, if NA line will not be plotted. Note that a hex color name must be used if col_polygon is not specified
`col_polygon`	Polygon color; if NA polygon will not be plotted
`cex_pt`	Size of point plotting symbols
`add`	boolean; if true this plot will be added to the current plot
`...`	Additional arguments to be passed to base graphics plotting commands