# Revision history [back]

I can think of 2 situations where you could need TCL/TK. First is with R. if you dwonload additional packages from CRAN servers, then TCL/TK provides a GUI Window to select the mirror. However there should be a fallback (text) mode - so this is not crucial.

The second possibility is if you want to use MATPLOTLIB directly from the python packages (scipy, numpy). TCL/TL is one possible "graphic backend". However in that case Sage needs to be compiled with compiler option MATPLOTLIBGUI=yes.

So bottom line: Probably you won't need TCL/TK and won't even notice if you don't have it.

I can think of 2 situations where you could need TCL/TK. First is with R. if you dwonload download additional packages from CRAN servers, then TCL/TK provides a GUI Window to select the mirror. However there should be a fallback (text) mode - so this is not crucial.

The second possibility is if you want to use MATPLOTLIB directly from the python packages (scipy, numpy). TCL/TL is one possible "graphic backend". However in that case Sage needs to be compiled with compiler option MATPLOTLIBGUI=yes.

So bottom line: Probably you won't need TCL/TK and won't even notice if you don't have it.