Cantor is missing possibility to add R backend
Binary package hint: kdeedu
"Cantor is an application that lets you use your favorite mathematical applications from within a nice KDE-integrated worksheet interface. It offers assistant dialogs for common tasks and allows sharing of worksheets with others. Available backends are Sage, Maxima, R, and KAlgebra."
This backends can be selected in the Cantor settings, however the R backend does not show up there. The R backend is also missing when r-recommended is installed. Maxima and Sage show up, even when they are not installed (which is good, e.g. you might have installed them in /opt).
On a further note the packages sagemath and maxima are both suggested by the package cantor, R is not. I am not sure if this are two different issues or not.
This is under Karmic KDE SC 4.4.0 with kubuntu-