我正在尝试使用 python 在同一个图形上绘制多个图。该图应该是线性的,x 坐标代表一天中的时间,y 坐标与值匹配。每个情节匹配不同的日期。
资料存盘在字典中。键代表日期,值包含 2 个串列:第一个匹配 x 坐标,第二个匹配 y 坐标。例如:
dict_data = {"4 April": [[datetime(1900, 1, 1, 22, 59), datetime(1900, 1, 1, 23, 1), datetime(1900, 1, 1, 23, 8), datetime(1900, 1, 1, 23, 50)], [405, 320, 300, 360]], "5 April": [[datetime(1900, 1, 1, 8, 10), datetime(1900, 1, 1, 9, 40), datetime(1900, 1, 1, 11, 8), datetime(1900, 1, 1, 11, 10)], [120, 20, 10, 0]]}
我在 Python 中使用 Matplotlib 发现堆栈溢位绘图时间的帖子。这没有帮助,因为他们创建的图表上的 x 轴是“datetime”型别,而我使用“datetime.time”datetime”。(我不希望 x 轴显示日期)。还有,他们创建的图表是散点图,而我需要它是线性的。
这是我尝试过的:
def multiple_plots(dict_data):
"""
Method to plot multiple times in one figure.
It receives a dictionary with the representation of the data in the csv file.
Every key in the dictionary represent a different date that will have its own plot ont the graph.
"""
for date, coordinates in dict_data.items():
time_coordinates = coordinates[0]
# converting the x coordinates in the type datetime.time to int
x_coordinates = matplotlib.dates.date2num(time_coordinates)
val_coordinates = coordinates[1]
plt.plot(list(map(int, x_coordinates)), list(map(int, val_coordinates)), label=date)
plt.legend(loc='best')
plt.show()
uj5u.com热心网友回复:
这应该可以毫不费力地作业:
import matplotlib.pyplot as plt
import datetime
dict_data = {"4 April": [[datetime.datetime(1900, 1, 1, 22, 59), datetime.datetime(1900, 1, 1, 23, 1), datetime.datetime(1900, 1, 1, 23, 8), datetime.datetime(1900, 1, 1, 23, 50)], [405, 320, 300, 360]], "5 April": [[datetime.datetime(1900, 1, 1, 8, 10), datetime.datetime(1900, 1, 1, 9, 40), datetime.datetime(1900, 1, 1, 11, 8), datetime.datetime(1900, 1, 1, 11, 10)], [120, 20, 10, 0]]}
fig, ax = plt.subplots()
for k in dict_data:
ax.plot(dict_data[k][0], dict_data[k][1])
plt.show()
显然这看起来有点局促,但如果你使用简洁的转换器:
plt.rcParams['date.converter'] = 'concise'
然后你得到
uj5u.com热心网友回复:
基于有问题的编辑进行编辑
代码,使用plot_date
和线型'-'
。
import matplotlib
import numpy as np
from datetime import datetime
import matplotlib.pyplot as plt
dict_data = {"4 April": [[np.datetime64("2022-07-01T22:59:00"), np.datetime64("2022-07-01T23:01:00"), np.datetime64("2022-07-01T23:08:00"), np.datetime64("2022-07-01T23:50:00")], [405, 320, 300, 360]], "5 April": [[np.datetime64("2022-07-01T08:10:00"), np.datetime64("2022-07-01T09:40:00"), np.datetime64("2022-07-01T11:08:00"), np.datetime64("2022-07-01T11:10:00")], [120, 20, 10, 0]]}
# dict_data = {"4 April": [[datetime(2022, 7, 1, 22, 59), datetime(2022, 7, 1, 23, 1), datetime(2022, 7, 1, 23, 8), datetime(2022, 7, 1, 23, 50)], [405, 320, 300, 360]], "5 April": [[datetime(2022, 7, 1, 8, 10), datetime(2022, 7, 1, 9, 40), datetime(2022, 7, 1, 11, 8), datetime(2022, 7, 1, 11, 10)], [120, 20, 10, 0]]}
def multiple_plots(dict_data):
"""
Method to plot multiple times in one figure.
It receives a dictionary with the representation of the data in the csv file.
Every key in the dictionary represent a different date that will have its own plot ont the graph.
"""
for date, coordinates in dict_data.items():
time_coordinates = coordinates[0]
# converting the x coordinates in the type np.datetime64 t2022-07-01To int
x_coordinates = matplotlib.dates.date2num(time_coordinates)
val_coordinates = coordinates[1]
plt.plot_date(list(map(int, x_coordinates)), list(map(int, val_coordinates)), '-', label=date)
plt.legend(loc='best')
plt.show()
multiple_plots(dict_data)
最终输出:
date2num
除了时间之外,该功能还需要年、月和日。因此,两个简单的修复是:
- 发送年、月和时间
dict_data = {"4 April": [[datetime(2022, 7, 1, 22, 59), datetime(2022, 7, 1, 23, 1), datetime(2022, 7, 1, 23, 8), datetime(2022, 7, 1, 23, 50)], [405, 320, 300, 360]], "5 April": [[datetime(2022, 7, 1, 8, 10), datetime(2022, 7, 1, 9, 40), datetime(2022, 7, 1, 11, 8), datetime(2022, 7, 1, 11, 10)], [120, 20, 10, 0]]}
- 发送
np.datetime64
型别
dict_data = {"4 April": [[np.datetime64("2022-07-01T22:59:00"), np.datetime64("2022-07-01T23:01:00"), np.datetime64("2022-07-01T23:08:00"), np.datetime64("2022-07-01T23:50:00")], [405, 320, 300, 360]], "5 April": [[np.datetime64("2022-07-01T08:10:00"), np.datetime64("2022-07-01T09:40:00"), np.datetime64("2022-07-01T11:08:00"), np.datetime64("2022-07-01T11:10:00")], [120, 20, 10, 0]]}
他们都作业。最后的情节是:
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