[PATCH] Add r-doparallel.

[Ricardo Wurmus]

Attached are four patches for useful R packages.

>From ed52995e0723a9828f21e741f92439934470c4ac Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <address@hidden>
Date: Thu, 17 Mar 2016 17:13:59 +0100
Subject: [PATCH 1/4] gnu: Add r-iterators.

* gnu/packages/statistics.scm (r-iterators): New variable.
---
 gnu/packages/statistics.scm | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/gnu/packages/statistics.scm b/gnu/packages/statistics.scm
index 3d44533..217f365 100644
--- a/gnu/packages/statistics.scm
+++ b/gnu/packages/statistics.scm
@@ -1679,6 +1679,26 @@ matrices.  It includes Cholesky decomposition and 
backsolving as well as
 standard R subsetting and Kronecker products.")
     (license license:gpl2+)))
 
+(define-public r-iterators
+  (package
+    (name "r-iterators")
+    (version "1.0.8")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (cran-uri "iterators" version))
+       (sha256
+        (base32
+         "1f057pabs7ss9h1n244can26qsi5n2k3salrdk0b0vkphlrs4kmf"))))
+    (build-system r-build-system)
+    (home-page "http://cran.r-project.org/web/packages/iterators";)
+    (synopsis "Iterator construct for R")
+    (description
+     "This package provides support for iterators, which allow a programmer to
+traverse through all the elements of a vector, list, or other collection of
+data.")
+    (license license:asl2.0)))
+
 (define-public r-dt
   (package
     (name "r-dt")
-- 
2.1.0

>From eb559b54738d68a8dba5dd6b7089e4a20b6b8026 Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <address@hidden>
Date: Thu, 17 Mar 2016 17:14:22 +0100
Subject: [PATCH 2/4] gnu: Add r-codetools.

* gnu/packages/statistics.scm (r-codetools): New variable.
---
 gnu/packages/statistics.scm | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/gnu/packages/statistics.scm b/gnu/packages/statistics.scm
index 217f365..97481b8 100644
--- a/gnu/packages/statistics.scm
+++ b/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")
-- 
2.1.0

>From b752b7f2457d23a96d6556d9e24debb03219bc20 Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <address@hidden>
Date: Thu, 17 Mar 2016 17:14:45 +0100
Subject: [PATCH 3/4] gnu: Add r-foreach.

* gnu/packages/statistics.scm (r-foreach): New variable.
---
 gnu/packages/statistics.scm | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/gnu/packages/statistics.scm b/gnu/packages/statistics.scm
index 97481b8..8116f50 100644
--- a/gnu/packages/statistics.scm
+++ b/gnu/packages/statistics.scm
@@ -1717,6 +1717,34 @@ data.")
 code for possible problems.")
     (license (list license:gpl2+ license:gpl3+))))
 
+(define-public r-foreach
+  (package
+    (name "r-foreach")
+    (version "1.4.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (cran-uri "foreach" version))
+       (sha256
+        (base32
+         "10aqsd3rxz03s1qdb6gsb1cj89mj4vmh491zfpin4skj1xvkzw0y"))))
+    (build-system r-build-system)
+    (propagated-inputs
+     `(("r-codetools" ,r-codetools)
+       ("r-iterators" ,r-iterators)))
+    (home-page "http://cran.r-project.org/web/packages/foreach";)
+    (synopsis "Foreach looping construct for R")
+    (description
+     "This package provides support for the @code{foreach} looping construct.
address@hidden is an idiom that allows for iterating over elements in a
+collection, without the use of an explicit loop counter.  This package in
+particular is intended to be used for its return value, rather than for its
+side effects.  In that sense, it is similar to the standard @code{lapply}
+function, but doesn't require the evaluation of a function.  Using
address@hidden without side effects also facilitates executing the loop in
+parallel.")
+    (license license:asl2.0)))
+
 (define-public r-dt
   (package
     (name "r-dt")
-- 
2.1.0

>From c386783cdba3798c881e0c8ff4b94baa785208f1 Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <address@hidden>
Date: Thu, 17 Mar 2016 17:15:02 +0100
Subject: [PATCH 4/4] gnu: Add r-doparallel.

* gnu/packages/statistics.scm (r-doparallel): New variable.
---
 gnu/packages/statistics.scm | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/gnu/packages/statistics.scm b/gnu/packages/statistics.scm
index 8116f50..15c6823 100644
--- a/gnu/packages/statistics.scm
+++ b/gnu/packages/statistics.scm
@@ -1745,6 +1745,29 @@ function, but doesn't require the evaluation of a 
function.  Using
 parallel.")
     (license license:asl2.0)))
 
+(define-public r-doparallel
+  (package
+    (name "r-doparallel")
+    (version "1.0.10")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (cran-uri "doParallel" version))
+       (sha256
+        (base32
+         "1mddx25l25pw9d0csnx2q203dbg5hbrhkr1f08kw0p02a1lln0kh"))))
+    (properties `((upstream-name . "doParallel")))
+    (build-system r-build-system)
+    (propagated-inputs
+     `(("r-foreach" ,r-foreach)
+       ("r-iterators" ,r-iterators)))
+    (home-page "http://cran.r-project.org/web/packages/doParallel";)
+    (synopsis "Foreach parallel adaptor for the 'parallel' package")
+    (description
+     "This package provides a parallel backend for the @code{%dopar%} function
+using the parallel package.")
+    (license license:gpl2+)))
+
 (define-public r-dt
   (package
     (name "r-dt")
-- 
2.1.0