gnu: Add r-codetools.

* gnu/packages/statistics.scm (r-codetools): New variable.

gnu/packages/statistics.scm

@@ -1699,6 +1699,24 @@ traverse through all the elements of a vector, list, or other collection of
 data.")
     (license license:asl2.0)))
 
+(define-public r-codetools
+  (package
+    (name "r-codetools")
+    (version "0.2-14")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (cran-uri "codetools" version))
+       (sha256
+        (base32
+         "0y9r4m2b8xgavr89sc179knzwpz54xljbc1dinpq2q07i4xn0397"))))
+    (build-system r-build-system)
+    (home-page "http://cran.r-project.org/web/packages/codetools")
+    (synopsis "Code analysis tools for R")
+    (description "This package provides code analysis tools for R to check R
+code for possible problems.")
+    (license (list license:gpl2+ license:gpl3+))))
+
 (define-public r-dt
   (package
     (name "r-dt")