diff --git a/.travis.yml b/.travis.yml
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index 0000000000000000000000000000000000000000..eba8c65e7e6508c629e47faaa2219df4b534f9dd
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@@ -0,0 +1,4 @@
+# R for travis: see documentation at https://docs.travis-ci.com/user/languages/r
+
+language: R
+cache: packages