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[英]Creating a new column based on values from other columns in python pandas
[英]pandas creating a new column based on other other columns
我有一个名为 bank 的 dataframe 并且我想创建一个新列来解释百分比变化但是当我尝试时遇到此错误:不支持的操作数类型为 -:'str' 和 'str' 我该如何解决这个问题或者我还有其他方法可以创建这个专栏吗?
bank=bank.iloc[0:15,0:4]
pctchange=(bank['Yüksek']-bank['Düşük'])-bank['Düşük']
def risk(bank):
if pctchange>0.3:
val='High Risk'
elif pctchange>0.2 :
val='Middle Risk'
else:
val='Low Risk'
return val
bank.apply(risk,axis=1)
您可以清理数据,然后尝试更改类型,如下所示:
# Replace commas with points
bank = bank.apply(lambda x: x.str.replace(',', '.'))
# Convert to float
bank = bank.astype('float64')
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