dynamo.pl.plot_nullclines(vecfld, vecfld_dict=None, lw=3, background=None, save_show_or_return='return', save_kwargs={}, ax=None)[source]

Plot nullclines stored in the VectorField2D class.

  • vecfld (Topography2D) – an instance of the VectorField2D class which presumably has fixed points computed and stored.

  • vecfld_dict (Optional[Dict[str, Any]]) – a dict with entries to create a VectorField2D instance. Defaults to None.

  • lw (float) – the linewidth of the nullcline. Defaults to 3.

  • background (Optional[float]) – the background color of the plot. Defaults to None.

  • save_show_or_return (Literal['save', 'show', 'return']) – whether to save, show, or return the figure. Defaults to “return”.

  • save_kwargs (Dict[str, Any]) – a dictionary that will be passed to the save_show_ret function. By default, it is an empty dictionary and the save_show_ret function will use the {“path”: None, “prefix”: ‘plot_nullclines’, “dpi”: None, “ext”: ‘pdf’, “transparent”: True, “close”: True, “verbose”: True} as its parameters. Otherwise, you can provide a dictionary that properly modify those keys according to your needs. Defaults to {}.

  • ax (Optional[Axes]) – the matplotlib axes used for plotting. Default is to use the current axis. Defaults to None.

Return type:



None would be returned by default. If save_show_or_return is set to be ‘return’, the Axes of the generated figure would be returned.