gnu: Add IRanges.

* gnu/packages/bioinformatics.scm (r-iranges): New variable.

gnu/packages/bioinformatics.scm

@@ -3215,6 +3215,36 @@ (define-public r-s4vectors
 S4Vectors package itself.")
     (license license:artistic2.0)))
 
+(define-public r-iranges
+  (package
+    (name "r-iranges")
+    (version "2.4.6")
+    (source (origin
+              (method url-fetch)
+              (uri (bioconductor-uri "IRanges" version))
+              (sha256
+               (base32
+                "00x0266sys1fc5ipa639y84p6m6mgspk2xb099vcwmd3w4hypj9d"))))
+    (properties
+     `((upstream-name . "IRanges")
+       (r-repository . bioconductor)))
+    (build-system r-build-system)
+    (propagated-inputs
+     `(("r-biocgenerics" ,r-biocgenerics)
+       ("r-s4vectors" ,r-s4vectors)))
+    (home-page "http://bioconductor.org/packages/IRanges")
+    (synopsis "Infrastructure for manipulating intervals on sequences")
+    (description
+     "This package provides efficient low-level and highly reusable S4 classes
+for storing ranges of integers, RLE vectors (Run-Length Encoding), and, more
+generally, data that can be organized sequentially (formally defined as
+@code{Vector} objects), as well as views on these @code{Vector} objects.
+Efficient list-like classes are also provided for storing big collections of
+instances of the basic classes.  All classes in the package use consistent
+naming and share the same rich and consistent \"Vector API\" as much as
+possible.")
+    (license license:artistic2.0)))
+
 (define-public r-qtl
  (package
   (name "r-qtl")