gnu: Add r-txtplot.

* gnu/packages/statistics.scm (r-txtplot): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/statistics.scm

@@ -5642,6 +5642,26 @@ table made by the command @code{show256Colors()}.  You can also set the colors
 to any arbitrary string.  In this case, it is up to you to set valid values.")
     (license license:gpl3+)))
 
+(define-public r-txtplot
+  (package
+    (name "r-txtplot")
+    (version "1.0-3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (cran-uri "txtplot" version))
+       (sha256
+        (base32
+         "1949ab1bzvysdb79g8x1gaknj0ih3d6g63pv9512h5m5l3a6c31h"))))
+    (build-system r-build-system)
+    (home-page "https://cran.r-project.org/web/packages/txtplot/")
+    (synopsis "Text-based plotting")
+    (description "This package provides functions to produce rudimentary ASCII
+graphics directly in the terminal window.  This package provides a basic
+plotting function (and equivalents of curve, density, acf and barplot) as well
+as a boxplot function.")
+    (license license:lgpl3+)))
+
 (define-public java-jdistlib
   (package
     (name "java-jdistlib")