09/41: gnu: Add r-shades.

[guix-commits]

rekado pushed a commit to branch master
in repository guix.

commit 6e09f506130cc63b58bf7890d1a71b6f75c7610e
Author: Ricardo Wurmus <address@hidden>
Date:   Wed Jan 9 14:40:31 2019 +0100

    gnu: Add r-shades.
    
    * gnu/packages/cran.scm (r-shades): New variable.
---
 gnu/packages/cran.scm | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/gnu/packages/cran.scm b/gnu/packages/cran.scm
index a4b4897..da05dd4 100644
--- a/gnu/packages/cran.scm
+++ b/gnu/packages/cran.scm
@@ -9073,3 +9073,22 @@ in the NIfTI-1 and ANALYZE-7.5 formats, with seamless 
synchronisation between
 compiled C and interpreted R code.  It also provides a C/C++ API that can be
 used by other packages.")
     (license license:gpl2)))
+
+(define-public r-shades
+  (package
+    (name "r-shades")
+    (version "1.3.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (cran-uri "shades" version))
+       (sha256
+        (base32
+         "0qbg7b37ifgil7ka4vhk15wjf65rwha233yppqd9wlf3gys8784n"))))
+    (build-system r-build-system)
+    (home-page "https://github.com/jonclayden/shades";)
+    (synopsis "Simple color manipulation")
+    (description
+     "This package provides functions for easily manipulating colors,
+creating color scales and calculating color distances.")
+    (license license:bsd-3)))