31/36: gnu: Add viridis.

[Ricardo Wurmus]

rekado pushed a commit to branch master
in repository guix.

commit a28d646b635a3515135265aef0a4979abe24fe34
Author: Ricardo Wurmus <address@hidden>
Date:   Wed Dec 23 17:33:15 2015 +0100

    gnu: Add viridis.
    
    * gnu/packages/statistics.scm (r-viridis): New variable.
---
 gnu/packages/statistics.scm |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/gnu/packages/statistics.scm b/gnu/packages/statistics.scm
index 84f64d0..fefb717 100644
--- a/gnu/packages/statistics.scm
+++ b/gnu/packages/statistics.scm
@@ -1887,3 +1887,29 @@ also some vector-based methods, e.g. @code{binMeans()}, 
@code{madDiff()} and
 memory usage.")
     (license license:artistic2.0)))
 
+(define-public r-viridis
+  (package
+    (name "r-viridis")
+    (version "0.3.1")
+    (source (origin
+              (method url-fetch)
+              (uri (cran-uri "viridis" version))
+              (sha256
+               (base32
+                "0zz9i874s1fwhl9bcbiprlzaz7zsy1rj6c729zn3k525d63qbnj7"))))
+    (build-system r-build-system)
+    (propagated-inputs
+     `(("r-ggplot2" ,r-ggplot2)
+       ("r-gridextra" ,r-gridextra)))
+    (home-page "https://github.com/sjmgarnier/viridis";)
+    (synopsis "Matplotlib default color map")
+    (description
+     "This package is a port of the new @url{matplotlib,
+http://matplotlib.org/} color maps (@code{viridis}--the default--,
address@hidden, @code{plasma}, and @code{inferno}) to R.  These color maps are
+designed in such a way that they will analytically be perfectly
+perceptually-uniform, both in regular form and also when converted to
+black-and-white.  They are also designed to be perceived by readers with the
+most common form of color blindness.")
+    (license license:x11)))
+