0
基本上,我不想在我的圖中繪製極值。我認爲根據圖的斜率來做這件事是一個好主意,但由於某種原因,我不斷收到錯誤,我的X軸上的日期不存在(DataFrame沒有Datumtijd屬性)。 (編輯:刪除文件的位置,因爲問題已被解答)Python 2.7不繪製基於熊貓數據框中的斜率的極值
from pylab import *
import matplotlib.pyplot as plt
import matplotlib.dates as pld
%matplotlib inline
import pandas as pd
from pandas import DataFrame
pbn135 = pd.read_csv('3873_135.csv', parse_dates=[0], index_col = 0, dayfirst = True, delimiter = ';', usecols = ['Datumtijd','DisplayWaarde'])
pbn135.plot()
for i in range(len(pbn135)):
slope = (pbn135.DisplayWaarde[i+1]-pbn135.DisplayWaarde[i])/(pbn135.Datumtijd[i+1]-pbn135.Datumtijd[i])