All images on this site are Copyright (C) the R Foundation and may be reproduced for any purpose provided they are credited to the R statistical software using an attribution like "(C) R Foundation, from http://www.r-project.org".
This screenshot either does not contain parts or visuals of copyrighted programs, or the author has released it under a free license (which should be indicated beneath this notice), and as such follows the licensing guidelines of Wikimedia Commons. You may use it freely according to its particular license.
Free Software License:
The copyright holder of this file allows anyone to use it for any purpose, provided that the copyright holder is properly attributed. Redistribution, derivative work, commercial use, and all other use is permitted.
Note: if the screenshot shows any work that is not a direct result of the program code itself, such as a text or graphics that are not part of the program, the license for that work must be indicated separately.