Python PYQT drawing histograms

#-*-coding:utf-8-*-"""In this example we draw the different kinds of histogram.""" fromQtpyImportqtwidgets, Qtgui, Qtcore fromQtpy. QtwidgetsImportqapplication, QwidgetImportdatetime as DT fromVnpy.traderImport* fromVnpy.trader.uiKLineImport* fromVnpy.trader.widget.crosshairToolImportCrosshairtoolImportPyqtgraph as PGImportNumPy as NPImportMatplotlib.pyplot as PltImportMatplotlib.mlab as MlabImportSYSclassHistogramlutwidget (qwidget):def __init__(Self, data, parent=None): Self.parent=Parent Self.data=Data Super (Histogramlutwidget, self).__init__(parent)#Inheritance    #Interface Layoutself.pw=pg. Plotwidget () Self.lay_kl= pg. Graphicslayout (border= (100, 100, 100)) Self.lay_KL.setContentsMargins (10, 10, 10, 10) self.lay_KL.setSpacing (0) self.lay_KL.setBorder (color= (255, 255, 255, 255), width=0.8) self.lay_KL.setZValue (0) Self.pw.setCentralItem (SELF.LAY_KL)## Set the horizontal axis    #xdict = dict (Enumerate (self.data["Timelist"]))    #self.axistime = Mystringaxis (xdict, orientation= ' bottom ')    ## Initialize the sub-diagramSELF.INITPLOTPNL ()## Register Cross cursorx=[] Viwe=self.plt Self.crosshair=Crosshairtool (SELF.PW, X, Viwe, self)#Setup InterfaceSelf.vb =qtwidgets.qvboxlayout () self.vb.addWidget (SELF.PW) self.setlayout (Self.vb)# ----------------------------------------------------------------------    defINITPLOTPNL (self, xmin=0, xmax=-1): Vals=Np.hstack (self.data) xMin=min (self.data) Xmax=Max (Self.data)#Histogram        #y, x = Np.histogram (Vals, Bins=np.linspace (Xmin,xmax, +), normed=false,density=true)        ##histNX, xbins, Ptchs = Plt.hist (Self.data, bins=50, Normed=true, facecolor='Black', edgecolor='Black', Alpha=1,histtype ='Bar') Histo= Plt.hist (Self.data, 50) VB=Customviewbox ()#SELF.PLT=PG. Plotitem (VIEWBOX=VB, axisitems={' bottom ': self.axistime}) #设置x轴Self.plt = pg. Plotitem (viewbox=vb) leng_=Len (self.data) self.plt.setRange (XRange= (0, leng_), yrange=(XMin, xmax))##histogram        #self.plt.plot (x, Y, Stepmode=true, filllevel=0, brush= (0, 0, 255, y), size=0.4) #绘制统计所得到的概率密度, histogram, no boundary split line        ##hist Barwidth = xbins[1]-xbins[0]#Width of each bin.        #Self.plt.plot (x,y,width=width) # The probability density obtained by plotting statistics, line graphSelf.pi=pg. Bargraphitem (X=histo[1][0:50],height=histo[0],width=width, color='y',)#the probability density obtained by drawing statistics, bar graphSelf.plt.addItem (Self.pi) Self.lay_KL.addItem (SELF.PLT)defRefresh (self):"""Refresh the actual extent of the sub-graph"""Leng_=Len (self.data) xMin=min (self.data) Xmax=Max (Self.data) self.plt.setRange (XRange= (0, leng_), yrange=(XMin, xmax))if __name__=='__main__': App=qapplication (SYS.ARGV) ex=Histogramlutwidget () sys.exit (App.exec_ ())

# # # #才接触, the project is not carefully studied, there are mistakes in the correction of the place, I hope you are not hesitate to point out

Python PYQT drawing histograms