From 81562b02528072e4bac98152bbbc07704ae9e431 Mon Sep 17 00:00:00 2001
From: Billy Su <g4691821@gmail.com>
Date: Sat, 3 Feb 2018 10:16:09 +0800
Subject: [PATCH] Refactor MultiPlotSpeedTest.py

* Change variable to meaningful name,
* Remove the outdated commented out code.
---
 examples/MultiPlotSpeedTest.py | 40 ++++++++++++++--------------------
 1 file changed, 16 insertions(+), 24 deletions(-)

diff --git a/examples/MultiPlotSpeedTest.py b/examples/MultiPlotSpeedTest.py
index 0d0d701b..f4295687 100644
--- a/examples/MultiPlotSpeedTest.py
+++ b/examples/MultiPlotSpeedTest.py
@@ -12,32 +12,27 @@ from pyqtgraph.Qt import QtGui, QtCore
 import numpy as np
 import pyqtgraph as pg
 from pyqtgraph.ptime import time
-#QtGui.QApplication.setGraphicsSystem('raster')
 app = QtGui.QApplication([])
-#mw = QtGui.QMainWindow()
-#mw.resize(800,800)
 
-p = pg.plot()
-p.setWindowTitle('pyqtgraph example: MultiPlotSpeedTest')
-#p.setRange(QtCore.QRectF(0, -10, 5000, 20)) 
-p.setLabel('bottom', 'Index', units='B')
+plot = pg.plot()
+plot.setWindowTitle('pyqtgraph example: MultiPlotSpeedTest')
+plot.setLabel('bottom', 'Index', units='B')
 
 nPlots = 100
 nSamples = 500
-#curves = [p.plot(pen=(i,nPlots*1.3)) for i in range(nPlots)]
 curves = []
-for i in range(nPlots):
-    c = pg.PlotCurveItem(pen=(i,nPlots*1.3))
-    p.addItem(c)
-    c.setPos(0,i*6)
-    curves.append(c)
+for idx in range(nPlots):
+    curve = pg.PlotCurveItem(pen=(idx,nPlots*1.3))
+    plot.addItem(curve)
+    curve.setPos(0,idx*6)
+    curves.append(curve)
 
-p.setYRange(0, nPlots*6)
-p.setXRange(0, nSamples)
-p.resize(600,900)
+plot.setYRange(0, nPlots*6)
+plot.setXRange(0, nSamples)
+plot.resize(600,900)
 
 rgn = pg.LinearRegionItem([nSamples/5.,nSamples/3.])
-p.addItem(rgn)
+plot.addItem(rgn)
 
 
 data = np.random.normal(size=(nPlots*23,nSamples))
@@ -46,13 +41,12 @@ lastTime = time()
 fps = None
 count = 0
 def update():
-    global curve, data, ptr, p, lastTime, fps, nPlots, count
+    global curve, data, ptr, plot, lastTime, fps, nPlots, count
     count += 1
-    #print "---------", count
+
     for i in range(nPlots):
         curves[i].setData(data[(ptr+i)%data.shape[0]])
-        
-    #print "   setData done."
+
     ptr += nPlots
     now = time()
     dt = now - lastTime
@@ -62,13 +56,11 @@ def update():
     else:
         s = np.clip(dt*3., 0, 1)
         fps = fps * (1-s) + (1.0/dt) * s
-    p.setTitle('%0.2f fps' % fps)
+    plot.setTitle('%0.2f fps' % fps)
     #app.processEvents()  ## force complete redraw for every plot
 timer = QtCore.QTimer()
 timer.timeout.connect(update)
 timer.start(0)
-    
-
 
 ## Start Qt event loop unless running in interactive mode.
 if __name__ == '__main__':