TypeError：無法從dtype（'

Question

當試圖在散點圖上使用不同的顏色繪制離群值時，我遇到了此錯誤：

TypeError：根據規則“安全”，無法將數組數據從dtype（'U1'）轉換為dtype（'float64'）

我的代碼：

import statsmodels.api as sm
import pandas as pd
import matplotlib.pyplot as plt
import numpy as np

CRP = pd.read_csv('CarsProp.csv')

priceMean = CRP.price.mean()
priceStd = CRP.price.std()   

CRP['isOutlierPrice'] = np.nan
testColumn1 = abs(CRP.price - priceMean) > 2*priceStd

for i, value in enumerate(testColumn1):
    if value == True:
        CRP['isOutlierPrice'][i] = 1

mileageMean = CRP.mileage.mean()
mileageStd = CRP.mileage.mean()

CRP['isOutlierMileage'] = np.nan
testColumn2 = abs(CRP.mileage - mileageMean) > 2*priceStd

for i, value in enumerate(testColumn2):
    if value == True:
        CRP['isOutlierMileage'][i] = 1

outlierPmsJoint = ((CRP['isOutlierPrice'] == 1) | (CRP['isOutlierMileage'] == 1))

colorChoiceDict = {True: (1.0, 0.55, 0.0, 1.0), 
              False: (0.11, 0.65, 0.72, 0.1)}

colorCol = [colorChoiceDict[val] for val in outlierPmsJoint]

PriceFloat = [float(val) for val in CRP.price]
MileageFloat = [float(val) for val in CRP.mileage]

plt.figure()
plt.scatter(PriceFloat, MileageFloat, c = colorCol, linewidth='0')
plt.set_title('Price vs. Mileage with outliers')  

有誰知道問題在哪里以及如何解決？ 謝謝，

Answer 1

問題出在散布圖線上。 它應該是：

plt.scatter(PriceFloat, MileageFloat, c = colorCol, linewidth=0)

我將線寬arg置於倒置昏迷狀態，這沒有產生輸出。 但是，錯誤消息是非常令人誤解的。 下次在調試時，我可能會較少關注該錯誤消息。