markevery AttributeError的问题：未知属性markevery

Question

我正在尝试指定在散点图中为序列放置标记的频率。在网上搜索时，我发现了markevery，但尽管有文档和其他示例，我还是搞不懂。有人能告诉我如何使用散点图的markevery吗？ 以下是我的最新消息：

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.colors as colors
import matplotlib.lines as lines
from matplotlib import cm
import csv
import itertools

callSignList = []
xList = []
yList = []
timeList = []

#prepare the plot
fig = plt.figure(figsize=(18,13))
ax = fig.add_subplot(111)
ax.set_title("Sim Time",fontsize=14)
ax.set_xlabel("X",fontsize=12)
ax.set_ylabel("Y",fontsize=12)
ax.grid(True,linestyle='-',color='0.75')
cNorm  = colors.Normalize(vmin=0, vmax=3600)
marker = itertools.cycle(('o', '^', '+', '8', 's', 'p', 'x'))


path = "C:\\Users\\otherDirectories\\"
searchString = "timeToGo.csv"

csvFile  = open(path + searchString, "rb")
reader = csv.reader(csvFile)

currentCallsign = ""
firstItem = 1
for row in reader:
    if float(row[3]) < 1 : continue
    else:
        if currentCallsign == row[0]:
            callSignList.append(row[0])
            xList.append(float(row[1]))
            yList.append(float(row[2]))
            timeList.append(float(row[3]))
            currentCallsign = row[0]
            #print row[0], row[1], row[2], row[3]
        else:
            if firstItem == 1 :
                callSignList.append(row[0])
                xList.append(float(row[1]))
                yList.append(float(row[2]))
                timeList.append(float(row[3]))
                currentCallsign = row[0]
                firstItem = 0
            else:

                x = xList
                y = yList

                #This is where I have problems withmarkevery
                timePlot = ax.scatter(x, y, s=50, c=timeList, marker = marker.next(), edgecolors='none', norm=cNorm, cmap = cm.jet) #cm.Spectral_r
                fig.subplots_adjust(top=0.90, bottom=0.15, hspace=0.25,) #left=0.07, right=0.95)

                #Annotations
                ax.annotate('ARC shares plan', xy=(400, 300), xytext=(500, 1.5), arrowprops=dict(facecolor='black', shrink=0.05),)

                del callSignList[:]
                del xList[:]
                del yList[:]
                del timeList[:]
                callSignList.append(row[0])
                xList.append(float(row[1]))
                yList.append(float(row[2]))
                timeList.append(float(row[3]))
                currentCallsign = row[0]

csvFile.close()


# Now adding the colorbar
cax = fig.add_axes([0.15, 0.06, 0.7, 0.05])
#The numbers in the square brackets of add_axes refer to [left, bottom, width, height],
#where the coordinates are just fractions that go from 0 to 1 of the plotting area. 
cbar = fig.colorbar(timePlot, cax, orientation='horizontal')
cbar.set_label('Relative Simulation Time')


plt.show()

读取的csv文件如下所示：

AMF2052，104.48336275.6281208

AMF2052104.48341275.628021209

AMF937277.02786191.210862267

[。。。更多行…]

我得到以下错误：

^{pr2}$

有什么我忘了包括的吗？我试着玩玩

markerFrequency = lines.Line2D.set_markevery(markerever=20)

但这也没用。在

任何帮助都将不胜感激。在

谢谢！在