[英]How to show tick labels in matplotlib histogram?
我通常不使用 Matplotlib,我試圖在時間序列直方圖中繪制一些信息。
當我放入數據時,我的直方圖工作正常,但我無法讓它顯示 xaxis 刻度標簽。
這是我的代碼(使用占位符數據):
import matplotlib.pyplot as plt
import matplotlib.dates as mdates
from matplotlib.dates import HourLocator as HourLocater
import datetime
from datetime import datetime
from datetime import timedelta
now = datetime.today()
timecount = []
for x in range(8):
datea = now-timedelta(hours=x)
dateb = str(datea).split(':')[0]
timecount.append(dateb)
fig, ax = plt.subplots(1,1)
ax.hist(timecount, bins=50, color='lightblue')
ax.xaxis.set_major_locator(HourLocater(interval=1))
ax.xaxis.set_major_formatter(mdates.DateFormatter('%Y-%m-%d %H'))
plt.show()
您正在使用字符串創建 x,然后嘗試使用日期時間格式化您的軸,讓我們堅持使用數據時間,並僅使用datea
變量而不是dateb
。
import matplotlib.pyplot as plt
import matplotlib.dates as mdates
from matplotlib.dates import HourLocator as HourLocater
import datetime
from datetime import datetime
from datetime import timedelta
now = datetime.today()
timecount = []
for x in range(8):
datea = now-timedelta(hours=x)
dateb = str(datea).split(':')[0]
timecount.append(datea)
fig, ax = plt.subplots(1,1)
ax.hist(timecount, bins=50, color='lightblue')
ax.xaxis.set_major_locator(HourLocater(interval=1))
ax.xaxis.set_major_formatter(mdates.DateFormatter('%Y-%m-%d %H'))
plt.xticks(rotation=90)
plt.show()
輸出:
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