From looking at the source code, most of R itself (vs the various packages) is licensed under one or other GPL variant. Certainly the logo file does not seem to have a specific license associated with it.
This question has actually been addressed in one of the R mail lists
Jan Wijffels wrote:
I was wondering if there are any guidelines for the use of the R logo on websites which are for commercial use? Similar to
http://www.python.org/community/logos/ for Python and to
http://www.postgresql.org/community/propaganda for PostgreSQL perhaps?
It has been discussed internally, but as far as I remember no official document ever transpired. The general sentiment (still
according to my memory) was that usage is OK as long as it doesn't
imply endorsement by R Core or the R Foundation, or any other
commingling with commercial products.
R and the "chocolate pretzel" logo are not registered as trademarks,
but even if they were, then "nominative usage" (as described in the
PSF Trademark Use Policy) should not be problematic. In cases of
-- O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph.
K () () -- University of Copenhagen Denmark Ph: (+45)
35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)
FAX: (+45) 35327907
The implication is that you are OK as long as you are not implying any certification or endorsement by the project. However, a quick emal to one of the maintainers can probably clear it up for you.
Some googling found this README at this site:
This directory contains the R Logo in several resolutions.
Rlogo-x.png has been used since approx 2000 for most purposes. Number
5 is currently used for web pages. The PNG versions have a transparent
background, the JPEG has a white background. These versions can be
distributed under the GPL.
Rlogo.svg has been created by Tobias Wolf in
October 2010, Rlogo.pdf is just a PDF created off the SVG using
inkscape. Both can be distributed under the Creative Commons
Attribution ShareAlike license, see http://creativecommons.org/.
Now the question you need to think about is whether you copy the logo file to your server (and what effect that has on the entire web site) or link to it