绘图

作者: maocy | 来源:发表于2017-06-14 15:03 被阅读0次

    地图+爬虫
    https://zhuanlan.zhihu.com/p/21883516

    颜色 线条

    k w r y g c b m
    http://www.cnblogs.com/darkknightzh/p/6117528.html

    date_parse=lambda dates: pd.datetime.strptime(dates,'%Y/%M/%D %H:%M%S)
    df_train=pd.read.csv('',parse_dates=[0],date_parser=date_parse)
    
    df_train['date']=pd.to_datetime(df_train['stime'].apply(lambda x:x.date()))
    df_train['time']=pd.to_datetime(df_train['stime'].apply(lambda x:x.time()))
    
    
    #时间序列作图
    import pandas as pd
    import matplotlib.pyplot as plt
    import matplotlib.dates as mdates
    
    
    date_parse = lambda dates: pd.datetime.strptime(dates, '%Y-%m-%d %H:%M:%S')
    df_train = pd.read_csv('C:/Users/user/Documents/gzyd/LTE2.csv', parse_dates=[0], date_parser=date_parse)
    
    
    
    eNodeB_171312=df_train[df_train.eNodeB==171312]
    start_date = pd.Timestamp('2017-4-20')
    end_date = pd.Timestamp('2017-4-21')
    eNodeB_171312_420=eNodeB_171312[(eNodeB_171312.stime>=start_date)&(eNodeB_171312.stime<end_date)]
    eNodeB_171312_420=eNodeB_171312_420.sort_values(["stime"],ascending=True)
    
    
    plt.style.use('ggplot')
    
    fig, ax = plt.subplots(1)
    fig.autofmt_xdate()
    plt.plot(eNodeB_171312_420['stime'], eNodeB_171312_420['max_user'], 'r')
    xfmt = mdates.DateFormatter('%H:%M')
    ax.xaxis.set_major_formatter(xfmt)
    plt.xticks(pd.date_range(min(eNodeB_171312_420['stime']),max(eNodeB_171312_420['stime']),freq='60min'))
    #plt.xticks(rotation=90)
    #ax.xaxis.set_minor_locator(hours)
    
    plt.show()
    
    plt.style.use('ggplot')
    plt.plot(data_num1['date_string'],data_num1_minmax['C12'],'g*:',label='C12')
    plt.plot(data_num1['date_string'],data_num1_minmax['C40'],'bo:',label='C40')
    plt.plot(data_num1['date_string'],data_num1_minmax['U19'],'r:',label='U19')
    plt.legend()
    

    颜色齐全

    [python中matplotlib的颜色及线条控制] (http://www.cnblogs.com/darkknightzh/p/6117528.html)
    python使用matplotlib绘制折线图教程(点 颜色等)
    http://www.jb51.net/article/104916.htm

    图例大小 位置 颜色

    https://www.zhihu.com/question/45028370/answer/98194654

    import numpy as np
    import matplotlib.pyplot as plt
    
    # Make some fake data.
    a = b = np.arange(0, 3, .02)
    c = np.exp(a)
    d = c[::-1]
    
    # Create plots with pre-defined labels.
    plt.plot(a, c, 'k--', label='Model length')
    plt.plot(a, d, 'k:', label='Data length')
    plt.plot(a, c + d, 'k', label='Total message length')
    
    legend = plt.legend(loc='upper center', title='Test', shadow=True, fontsize='x-large')
    
    # Put a nicer background color on the legend.
    legend.get_frame().set_facecolor('#00FFCC')
    legend.get_title().set_fontsize(fontsize = 20)
    # 不仅可以设置字体大小,还可以设置什么字体,因为legend.get_title()返回的是一个'Text'属性
    # 的对像,时刻不要忘记Matplotlib面向对像的画图方式啊
    plt.show()
    
    python matplotlib绘图设置坐标轴刻度、文本
    http://blog.csdn.net/fortware/article/details/51934814
    
    from pylab import *  
    from matplotlib.ticker import MultipleLocator, FormatStrFormatter  
      
    xmajorLocator   = MultipleLocator(20) #将x主刻度标签设置为20的倍数  
    xmajorFormatter = FormatStrFormatter('%1.1f') #设置x轴标签文本的格式  
    xminorLocator   = MultipleLocator(5) #将x轴次刻度标签设置为5的倍数  
      
    ymajorLocator   = MultipleLocator(0.5) #将y轴主刻度标签设置为0.5的倍数  
    ymajorFormatter = FormatStrFormatter('%1.1f') #设置y轴标签文本的格式  
    yminorLocator   = MultipleLocator(0.1) #将此y轴次刻度标签设置为0.1的倍数  
      
    t = arange(0.0, 100.0, 1)  
    s = sin(0.1*pi*t)*exp(-t*0.01)  
      
    ax = subplot(111) #注意:一般都在ax中设置,不再plot中设置  
    plot(t,s,'--b*')  
      
    #设置主刻度标签的位置,标签文本的格式  
    ax.xaxis.set_major_locator(xmajorLocator)  
    ax.xaxis.set_major_formatter(xmajorFormatter)  
      
    ax.yaxis.set_major_locator(ymajorLocator)  
    ax.yaxis.set_major_formatter(ymajorFormatter)  
      
    #显示次刻度标签的位置,没有标签文本  
    ax.xaxis.set_minor_locator(xminorLocator)  
    ax.yaxis.set_minor_locator(yminorLocator)  
      
    ax.xaxis.grid(True, which='major') #x坐标轴的网格使用主刻度  
    ax.yaxis.grid(True, which='minor') #y坐标轴的网格使用次刻度  
      
    show()  
    

    刻度显示字符/改变

    import matplotlib.pyplot as plt

    plt.style.use('ggplot')
    fx,ax = plt.subplots(1)
    ax.plot(data_index['cci601'],'k*:',label='C12')
    ticks = ax.set_xticks(range(26))
    labels = ax.set_xticklabels(data_index['name'],fontsize = 'small')
    ax.set_ylabel('signal quality')
    plt.ylim(-0.6,1.5)
    plt.show()

    绘图显示中文

    Matplotlib输出中文显示问题
    https://my.oschina.net/u/1180306/blog/279818

    缺失值导致绘图 ValueError: max must be larger than min in range parameter.

    data_20W_U6=data_20W['U6'].dropna()
    plt.hist(data_20W_U6,50, alpha=0.9, color='blue')
    

    seaborn
    http://blog.csdn.net/kevinelstri/article/details/52938604

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