R Studio Notebooks are pretty good too; I like that, by default, there is an interactive console connected to the same kernel in addition to the notebook. This allows me to use the console to interactively probe my data, or try out something, and then record a more finished product in the notebook itself. I think this can be done in Juypter (http://jupyter-notebook.readthedocs.io/en/latest/examples/No...), but, not out of the box.