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此代碼從Google財經中獲得一條直線的座標，並將第三個點放置在相同的距離上。有很多回溯ValueError：ordinal必須大於等於1
dt = datetime.datetime.fromordinal(ix).replace(tzinfo=UTC)
ValueError: ordinal must be >= 1
發生
import datetime as dt
from datetime import timedelta as td
import matplotlib.pyplot as plt
from matplotlib import style
import pandas as pd
import pandas_datareader.data as web
import numpy as np
start = dt.datetime(2017, 7, 1)
end = dt.datetime(2017, 3, 1)
# retrieving data from google
df = web.DataReader('TSLA', 'google', start,)
Dates = df.index
Highs = df['High'] # Getting only the values from the 'High' Column.
Highest_high = np.amax(Highs) # returns the Highest value
for i, h in enumerate(Highs):
if h == Highest_high :
Highests_index = i
#Highests_index = Highs.argmax() # returns the index of Highest value
Highest_high_2 = sorted(Highs)[-2]
for i, j in enumerate(Highs):
if j == Highest_high_2 :
Highests_index_2 = i
#================Problem Maybe starting from here========================
x = [Highests_index, Highests_index_2]
y = [Highest_high, Highest_high_2]
coefficients = np.polyfit(x, y, 1)
polynomial = np.poly1d(coefficients)
# the np.linspace lets you set number of data points, line length.
x_axis = np.linspace(3,Highests_index_2 + 1, 3)
y_axis = polynomial(x_axis)
plt.plot(x_axis, y_axis)
plt.plot(x[0], y[0], 'go')
plt.plot(x[1], y[1], 'go')
plt.plot(Dates, Highs)
plt.grid('on')
plt.show()
以下錯誤上面的代碼效果很好，當我剛繪製的數值，而無需使用datetime和大熊貓。我認爲這個問題可能在datetime或matplotlib中。
我知道這個問題可能看起來是重複的，但我無法將我的問題與其他任何解決方案聯繫在一起。