From 1b525f13351f9d540a44d5bbc876f17edf11ad57 Mon Sep 17 00:00:00 2001
From: kojix2 <2xijok@gmail.com>
Date: Mon, 21 Dec 2020 21:42:32 +0900
Subject: [PATCH] Support headers in progressive mode

---
 lib/youplot/command.rb | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/lib/youplot/command.rb b/lib/youplot/command.rb
index 3f68516..1667b11 100644
--- a/lib/youplot/command.rb
+++ b/lib/youplot/command.rb
@@ -63,7 +63,16 @@ module YouPlot
     def main_progressive(input)
       output_data(input)
 
-      @raw_data ||= String.new
+      # FIXME
+      # Worked around the problem of not being able to draw
+      # plots when there is only one header line.
+      if @raw_data.nil?
+        @raw_data = String.new
+        if options[:headers]
+          @raw_data << input
+          return
+        end
+      end
       @raw_data << input
 
       # FIXME