Question

我想用下面的样本绘制图表，X轴：'时间'，Y轴：'Celcius'。附上代码，我在x轴上[09：00：00.000000 09：05：00.000000 ... 09：30：00.000000]而不是[2013-01-02 09:00 2013-01-02 09] ：05 ... 2013-01-02 09:30]。我可以知道将x轴格式化为指定格式的正确方法是什么？

data = {'Celcius': [36.906441135554658, 51.286294403017202], 'Time': [datetime.datetime(2013, 1, 2, 9, 0), datetime.datetime(2013, 1, 2, 9, 30)]}

def plotTemperature(self, data):
    logging.debug(data)

    t = data.get('Time')
    T = data.get('Celcius')

    years    = mdates.YearLocator()   # every year
    months   = mdates.MonthLocator()  # every month
    days    = mdates.DayLocator()     # every day
    hours = mdates.HourLocator()      # every hour      
    minutes = mdates.MinuteLocator()  # every minute  
    yearsFmt = mdates.DateFormatter('%Y')
    hoursFmt = mdates.DateFormatter('%H')

    fig, ax = plt.subplots()
    ax.plot(t, T)        

    # format the ticks
    # ax.xaxis.set_major_locator(hours)
    # ax.xaxis.set_major_formatter(hoursFmt)
    # ax.xaxis.set_minor_locator(minutes)

    datemin = datetime.datetime(min(t).year, min(t).month, min(t).day, min(t).hour, min(t).minute) 
    datemax = datetime.datetime(max(t).year, max(t).month, max(t).day, max(t).hour, max(t).minute)
    ax.set_xlim(datemin, datemax)

    # format the coords message box
    def temperature(x): return '$%1.2f'%x
    ax.format_xdata = mdates.DateFormatter('%Y-%m-%d %H:%M')
    ax.format_ydata = temperature
    ax.grid(True)

    # rotates and right aligns the x labels, and moves the bottom of the
    # axes up to make room for them
    fig.autofmt_xdate()

    plt.show()

好吧，找到了解决方案......

    ymdhFmt = mdates.DateFormatter('%Y-%m-%d %H:%M')
    rule = rrulewrapper(MINUTELY, interval=30)
    loc = RRuleLocator(rule)
    ax.xaxis.set_major_locator(loc)
    ax.xaxis.set_major_formatter(ymdhFmt)

matplotlib绘制X轴，其中＆＃39;％Y-％m-％d％H：％M＆＃39;

0 个答案: