我正在尝试从CSV文件中解析某些日期,格式为“ 2014-07-01”。然后我想把它放在图的x轴上
下面是我的代码。一切都很好,如第一个图像所示。
import csv
from matplotlib import pyplot as plt
from datetime import datetime
# Get high temperatures from file.
filename = 'sitka_weather_07-2014.csv'
with open(filename) as f:
reader = csv.reader(f)
highs = []
dates = []
for row in reader:
high = int(row[1])
highs.append(high)
date = datetime.strptime(row[0], '%Y-%m-%d')
dates.append(date)
#Plot data
fig = plt.figure(dpi=128, figsize = (10,6))
plt.plot(dates, highs, c='red')
#Format plot
plt.title("Daily high temperatures, July 2014", fontsize = 24)
plt.xlabel('', fontsize=16)
#draws the date labels diagonally to prevent them from overlapping
fig.autofmt_xdate()
plt.ylabel("Temperature (F)", fontsize=16)
plt.tick_params(axis='both', which='major', labelsize=16)
plt.show()
但是当我尝试使用strftime()方法重新设置日期格式时,x轴被弄乱了,如第二幅图所示。我所做的唯一更新如下:
date = datetime.strptime(row[0], '%Y-%m-%d')
date = datetime.strptime(row[0], '%Y-%m-%d').strftime('%Y/%m/%d')
任何人都在想哪里出了什么问题?任何帮助表示赞赏!