From 0052b4aa565990853273605c809da3b983f34488 Mon Sep 17 00:00:00 2001
From: Vicente Vera Parra <address@hidden>
Date: Sun, 13 Sep 2015 13:25:37 -0300
Subject: [PATCH 15/19] gnu: Add r-memoise.

* gnu/packages/statistics.scm (r-memoise): 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 b3c9ee1..cb9a793 100644
--- a/gnu/packages/statistics.scm
+++ b/gnu/packages/statistics.scm
@@ -790,3 +790,23 @@ execution time of R expressions.")
      "Useful tools to pry back the covers of R and understand the
 language at a deeper level.")
     (license license:gpl2)))
+
+(define-public r-memoise
+  (package
+    (name "r-memoise")
+    (version "0.2.1")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://cran/src/contrib/memoise_"
+                                  version ".tar.gz"))
+              (sha256
+               (base32 "19wm4b3kq6xva43kga3xydnl7ybl5mq7b4y2fczgzzjz63jd75y4"))))
+    (build-system r-build-system)
+    (propagated-inputs
+     `(("r-digest" ,r-digest)))
+    (home-page "http://github.com/hadley/memoise")
+    (synopsis "Memoise functions")
+    (description
+     "Cache the results of a function so that when you call it again
+with the same arguments it returns the pre-computed value.")
+    (license license:expat)))
-- 
2.5.1