Permission is granted to copy and distribute translations of this manual Manual under the conditions for verbatim copying, provided that theĮntire resulting derived work is distributed under the terms of a Permission is granted to copy and distribute modified versions of this Manual provided the copyright notice and this permission notice are Permission is granted to make and distribute verbatim copies of this R add-on packages, writing R documentation, R's system andįoreign language interfaces, and the R API. This is a guide to extending R, describing the process of creating 8 Linking GUIs and other front-ends to R.