From 80c5230b4e18b5f3748b00e8aa5fb1f472c415f4 Mon Sep 17 00:00:00 2001
From: Bret Marzolf <marzolfb@yahoo.com>
Date: Tue, 21 Feb 2017 16:30:34 -0800
Subject: [PATCH] Fix #89 - fix gridline rendering when using non-numeric
 static labels

---
 src/Axis.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Axis.js b/src/Axis.js
index b8cfc5b..558d05b 100644
--- a/src/Axis.js
+++ b/src/Axis.js
@@ -87,8 +87,9 @@ class AxisStruct {
       item: currentAxis,
       path: Pathjs().moveto(start).lineto(end).closepath(),
       ticks: ticks,
-      lines: ticks.map(c => {
-        const lineStart = {x: horizontal ? this.scale(c) + margin.left : xAxis.min + margin.left, y: horizontal ? yAxis.min + margin.top : this.scale(c) + margin.top}
+      lines: ticks.map((c,i) => {
+        let scaleBase = isNaN(c) ? i : c
+        const lineStart = {x: horizontal ? this.scale(scaleBase) + margin.left : xAxis.min + margin.left, y: horizontal ? yAxis.min + margin.top : this.scale(scaleBase) + margin.top}
         return Pathjs().moveto(lineStart).lineto(horizontal ? lineStart.x : xAxis.max + margin.left, horizontal ? yAxis.max + (margin.top - tailLength) : lineStart.y)
       },this)
     }