Using R kernel in interactive window, a key shortcut to execute current chunk/cell and line/selection in interactive when language mode in editor is R

[jaakko-paavola]

I am experimenting with R in VS code using https://github.com/IRkernel/IRkernel and https://github.com/REditorSupport/vscode-R. It seems to work fine otherwise, but a big problem for me is that I cannot keep the language mode in the editor as 'R' and be able to send chunks/cells or current line/selection to the interactive window, because those keyboard shortcuts seem to work only in Python language mode. If I change the language mode to Python, I lose R syntax highlighting, autocompletion and other goodies provided by https://github.com/REditorSupport/vscode-R.

[DonJayamanne]

this functionality is currently tracked here #273
please upvote that issue

[jaakko-paavola]

Thanks. Actually I just realized that "Jupyter: Run Selection/Line in Interactive Window" works with R language mode if the When condition has editorLangId == 'r'. Even the cell running commands work if I switch the language mode to Python and then back to R -- until I switch the active tab, after which it stops working.

[DonJayamanne]

Thanks, that sounds like a bug in our code. Will look into this.

[jaakko-paavola]

Now that the Jupyter extension is officially supporting R (https://github.com/microsoft/vscode-jupyter/blob/113c3e54ac1d3cb81ab6473d1a5fa4a20cce4755/README.md#working-with-other-languages), is there a way to have it send your current R code chunk in an .Rmd file to the interactive window?

I suppose you could edit the setting "jupyter.interactiveWindow.cellMarker.codeRegex": "^(#\s*%%|#\s*\<codecell\>|#\sIn\[\d?\]|#\s*In\[ \])" to also match R markdown cells starting with {r} and ending with . But when I tried this I did not get it working unless I also changed the setting "jupyter.defaultCellMarker": "# %%" to "```{r}". Also, as the description of the setting says: Cell marker used for delineating a cell in a python file, these cells seem to be only recognized in .py files, not in .Rmd files.