From 4b4848438c39618a3d3d5cae7e2d393700e75a5b Mon Sep 17 00:00:00 2001
From: kojix2 <2xijok@gmail.com>
Date: Sun, 8 Nov 2020 12:21:05 +0900
Subject: [PATCH] Make sure the labels are String

---
 lib/uplot/plot.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/uplot/plot.rb b/lib/uplot/plot.rb
index d726c8a..0e74a81 100644
--- a/lib/uplot/plot.rb
+++ b/lib/uplot/plot.rb
@@ -15,7 +15,7 @@ module Uplot
         params.title = headers[0] if headers
       end
       params.title ||= headers[1] if headers
-      labels = series[0]
+      labels = series[0].map(&:to_s)
       values = series[1].map(&:to_f)
       UnicodePlot.barplot(labels, values, **params.to_hc)
     end