[ESS] R object tooltips
iverson at biostat.wisc.edu
Sun Feb 1 01:58:57 CET 2009
I just wrote an elisp function that, when invoked in a .R buffer, will display
information about the R object in a tooltip. The information that is displayed
will depend on what class the object is. For example, factors will have a table
displayed, and numeric variables will have the standard summary shown.
I uploaded a video demonstration of the function at
You can find the code for the function and documentation at
http://www.biostat.wisc.edu/~iverson/ess-R-object-tooltip.el and please note
that in the comments, it says:
;; IMPORTANT: This function calls tooltip-show-at-point,
;; which will need to be defined as found at
Also, an improvement would be if the tooltip displayed in a monospace font,
instead of the proportional default (on my system). I did not have time to look
into that, but I assume tooltip faces/fonts can be customized in Emacs.
I have the function bound to C-c C-g in ESS mode. My original idea was to show
the tooltip using the mouse whenever it was hovering over a valid R object, and
almost had that working, but not quite. The R objects must of course be present
in the current inferior R process. I hope this is useful to others for
interactive data analysis.
Let me know if you can think of any further improvements.
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