Python基于pylab库完成画线功能实例详解

这篇文章主要介绍了Python使用pylab库实现画线功能的方法,结合具体实例分析了Python使用pylab库的相关函数实现画线功能的操作技巧,并附带说明了相关函数与参数功能,需要的朋友可以参考下

本文实例讲述了Python使用pylab库实现画线功能的方法。分享给大家供大家参考，具体如下：

pylab 提供了比较强大的画图功能，但是函数和参数都比较多，很容易搞混。我们平常使用最多的应该是画线了。下面，简单的对一些常用的划线函数进行了封装，方便使用。

# -*- coding: utf-8 -*-import pylabimport randomclass MiniPlotTool :  '''  A mini tool to draw lines using pylab  '''  basecolors = ['red','green','yellow','blue','black','cyan','magenta']  def __init__(self, baseConfig) :    self.figsize = baseConfig.get('figsize',None)    self.axis = baseConfig.get('axis',None)    self.title = baseConfig.get('title','NoName')    self.ylabel = baseConfig.get('ylabel','NoName')    self.grid = baseConfig.get('grid',False)    self.xaxis_locator = baseConfig.get('xaxis_locator',None)    self.yaxis_locator = baseConfig.get('yaxis_locator',None)    self.legend_loc = baseConfig.get('legend_loc',0)    if self.figsize != None :      pylab.figure(figsize = self.figsize)    if self.axis != None :      pylab.axis(self.axis)    pylab.title(self.title)    pylab.ylabel(self.ylabel)    ax = pylab.gca()    pylab.grid(self.grid)    if self.xaxis_locator != None :      ax.xaxis.set_major_locator( pylab.MultipleLocator(self.xaxis_locator) )    if self.yaxis_locator != None :      ax.yaxis.set_major_locator( pylab.MultipleLocator(self.yaxis_locator) )    self.lineList = []    self.id = 1  def addline(self, lineConf) :    self.lineList.append((self.id, lineConf))    self.id += 1    return {'id' : self.id - 1}  def removeline(self, lineId) :    for i in range(len(self.lineList)) :      id, conf = self.lineList[i]      if id == lineId :        del self.lineList[i]        break    else :      return {'status' : -1}    print len(self.lineList)    return {'status' : 0}  def __parselineConf(self, lineConf) :    X = lineConf['X']    Y = lineConf['Y']    marker = lineConf.get('marker',None)    color = lineConf.get('color', random.choice(MiniPlotTool.basecolors))    markerfacecolor = lineConf.get('markerfacecolor',color)    label = lineConf.get('label','NoName')    linewidth = lineConf.get('linewidth',1)    linestyle = lineConf.get('linestyle','-')    return X, Y, marker, color, markerfacecolor, label, linewidth, linestyle  def plotSingleLine(self, lineConf):    X, Y, marker, color, markerfacecolor, label, linewidth, linestyle = self.__parselineConf(lineConf)    pylab.plot(X, Y, marker = marker, color = color, markerfacec<a>本文来源gao($daima.com搞@代@#码(网</a>olor = markerfacecolor, label=label, linewidth = linewidth, linestyle = linestyle)    pylab.legend(loc = self.legend_loc)  def plot(self) :    colors = [MiniPlotTool.basecolors[i % len(MiniPlotTool.basecolors)] for i in range(len(self.lineList))]    for i in range(len(self.lineList)) :      id, conf = self.lineList[i]      if conf.get('color',None) :        conf['color'] = colors[i]      X, Y, marker, color, markerfacecolor, label, linewidth, linestyle = self.__parselineConf(conf)      pylab.plot(X, Y, marker = marker, color = color, markerfacecolor = markerfacecolor, label=label, linewidth = linewidth, linestyle = linestyle)    pylab.legend(loc = self.legend_loc)  def show(self) :    pylab.show()if __name__ == '__main__' :  #test  baseConfig = {    #'figsize' : (6,8),    #'axis': [0,10,0,10],    #'title' : 'hello title',    #'ylabel' : 'hello ylabel',    'grid' : True,    #'xaxis_locator' : 0.5,    #'yaxis_locator' : 1,    #'legend_loc' : 'upper right'  }  tool = MiniPlotTool(baseConfig)  X = [ i for i in range(10)]  Y = [random.randint(1,10) for i in range(10)]  Y2 = [random.randint(1,10) for i in range(10)]  lineConf = {    'X' : X,    'Y' : Y    #'marker' : 'x',    #'color' : 'b',    #'markerfacecolor' : 'r',    #'label' : '222',    #'linewidth' : 3,    #'linestyle' : '--'  }  lineConf2 = {    'X' : X,    'Y' : Y2,    'marker' : 'o',    'color' : 'b',    'markerfacecolor' : 'r',    'label' : '222',    'linewidth' : 3,    'linestyle' : '--'  }  #tool.plotSingleLine(lineConf)  print tool.addline(lineConf)  print tool.addline(lineConf2)  #print tool.removeline(1)  tool.plot()  tool.show()

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