From 93e03856cac44d574178f85f70fff4d4bc2ac1b3 Mon Sep 17 00:00:00 2001
From: vicanso <tree.xie@outlook.com>
Date: Wed, 10 Aug 2022 20:39:14 +0800
Subject: [PATCH] fix: fix NaN of radar chart, #17

---
 radar_chart.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/radar_chart.go b/radar_chart.go
index eab70d5..429850d 100644
--- a/radar_chart.go
+++ b/radar_chart.go
@@ -200,7 +200,11 @@ func (r *radarChart) render(result *defaultRenderResult, seriesList SeriesList)
 				continue
 			}
 			indicator := indicators[j]
-			percent := (item.Value - indicator.Min) / (indicator.Max - indicator.Min)
+			var percent float64
+			offset := indicator.Max - indicator.Min
+			if offset > 0 {
+				percent = (item.Value - indicator.Min) / offset
+			}
 			r := percent * radius
 			p := getPolygonPoint(center, r, angles[j])
 			linePoints = append(linePoints, p)