fix multicategory ax.cleanPos

Author: etpinard

src/plots/cartesian/set_convert.js

@@ -322,7 +322,7 @@ module.exports = function setConvert(ax, fullLayout) {
         ax.p2r = p2l;
 
         ax.cleanPos = function(v) {
-            if(typeof v === 'string' && v !== '') return v;
+            if(Array.isArray(v) || (typeof v === 'string' && v !== '')) return v;
             return ensureNumber(v);
         };
     }

test/image/baselines/box-violin-x0-category-position.png

@@ -19,6 +19,17 @@
       "x0": 0.5,
       "type": "violin"
     },
+    {
+      "y": [ 0.6, 0.7, 0.3, 0.6, 0, 0.5, 0.7, 0.9, 0.5, 0.8, 0.7, 0.2, 0.1, 0.3, 0.1, 0.9, 0.6, 0.6, 0.9, 1, 0.3, 0.6, 0.8, 0.5, 0.6, 0.7, 0.3, 0.6, 0, 0.5, 0.7, 0.9, 0.5, 0.8, 0.7, 0.2 ],
+      "x0": ["2017", "day 1"],
+      "type": "violin"
+    },
+    {
+      "y": [ 0.6, 0.7, 0.3, 0.6, 0, 0.5, 0.7, 0.9, 0.5, 0.8, 0.7, 0.2, 0.1, 0.3, 0.1, 0.9, 0.6, 0.6, 0.9, 1, 0.3, 0.6, 0.8, 0.5, 0.6, 0.7, 0.3, 0.6, 0, 0.5, 0.7, 0.9, 0.5, 0.8, 0.7, 0.2 ],
+      "x0": "2017,day 2",
+      "type": "violin"
+    },
+
     {
       "y": [ 0.2, 0.2, 0.6, 1, 0.5, 0.4, 0.2, 0.7, 0.9, 0.1, 0.5, 0.3, 0.6, 0.7, 0.3, 0.6, 0, 0.5, 0.7, 0.9, 0.5, 0.8, 0.7, 0.2 ],
       "x": [ "day 1", "day 1", "day 1", "day 1", "day 1", "day 1", "day 2",
@@ -52,6 +63,21 @@
         "text": "violin at x0:0.5",
         "y": 1.5
       },
+      {
+        "xref": "x",
+        "yref": "y",
+        "x": ["2017", "day 1"],
+        "text": "violin at x0:[2017,day 1]",
+        "y": 1.5
+      },
+      {
+        "xref": "x",
+        "yref": "y",
+        "x": "2017,day 2",
+        "text": "violin at x0:\"2017,day 2\"",
+        "y": 1.5,
+        "ay": -50
+      },
       {
         "xref": "x2",
         "yref": "y2",