confirm working on ubuntu
diff --git a/.Rproj.user/441ADA46/pcs/workbench-pane.pper b/.Rproj.user/441ADA46/pcs/workbench-pane.pper
new file mode 100644
index 0000000..b15bf23
--- /dev/null
+++ b/.Rproj.user/441ADA46/pcs/workbench-pane.pper
@@ -0,0 +1,6 @@
+{
+    "TabSet1" : 3,
+    "TabSet2" : 0,
+    "TabZoom" : {
+    }
+}
\ No newline at end of file