From de9007d9c47ecec1059bc0b26a3553ad93e2a0f7 Mon Sep 17 00:00:00 2001
From: Luke Campagnola <luke.campagnola@gmail.com>
Date: Wed, 30 May 2018 18:54:31 -0700
Subject: [PATCH] Fix error when using PlotDataItem with both stepMode and
 symbol

---
 pyqtgraph/graphicsItems/PlotDataItem.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pyqtgraph/graphicsItems/PlotDataItem.py b/pyqtgraph/graphicsItems/PlotDataItem.py
index c85c3e5b..2faa9ac1 100644
--- a/pyqtgraph/graphicsItems/PlotDataItem.py
+++ b/pyqtgraph/graphicsItems/PlotDataItem.py
@@ -490,6 +490,9 @@ class PlotDataItem(GraphicsObject):
             self.curve.hide()
         
         if scatterArgs['symbol'] is not None:
+            
+            if self.opts.get('stepMode', False) is True:
+                x = 0.5 * (x[:-1] + x[1:])                
             self.scatter.setData(x=x, y=y, **scatterArgs)
             self.scatter.show()
         else: