让我们说我们有如下表 如何行选择最大值和最小值的选定列
,我想找到最大值和最小值的每一行一组特定的列(让我们说CENSUS2010POP,ESTIMATESBASE1010,POPESTIMATE2010)。 如何用大熊猫做到这一点?
让我们说我们有如下表 如何行选择最大值和最小值的选定列
,我想找到最大值和最小值的每一行一组特定的列(让我们说CENSUS2010POP,ESTIMATESBASE1010,POPESTIMATE2010)。 如何用大熊猫做到这一点?
我想你需要和max
:
df_subset=df.set_index('CTYNAME')[['CENSUS2010POP', 'ESTIMATESBASE1010', 'POPESTIMATE2010']]
df1 = df_subset.min(axis=1)
print (df1)
df2= df_subset.max(axis=1)
print (df2)
编辑:
df = pd.DataFrame({'CTYNAME':['Alabama','Autauga County','Baldwin County','Barbour County'],
'CENSUS2010POP':[4,5,6,2],
'ESTIMATESBASE1010':[7,8,9,3],
'POPESTIMATE2010':[1,3,5,5]})
print (df)
CENSUS2010POP CTYNAME ESTIMATESBASE1010 POPESTIMATE2010
0 4 Alabama 7 1
1 5 Autauga County 8 3
2 6 Baldwin County 9 5
3 2 Barbour County
df_subset=df.set_index('CTYNAME')[['CENSUS2010POP', 'ESTIMATESBASE1010', 'POPESTIMATE2010']]
df1 = df_subset.max(axis=1) - df_subset.min(axis=1)
print (df1)
CTYNAME
Alabama 6
Autauga County 5
Baldwin County 4
Barbour County 3
dtype: int64
print (df1.nlargest(1).reset_index(name='top1'))
CTYNAME top1
0 Alabama 6
从列寻找最大值..参考http://stackoverflow.com/questions/15741759/find- maximum-value-of-a-column-and-return-the-corresponding-row-values-using-pan – Harsha
@HarshaBiyani我知道很热,可以在列中找到最大值...但是我需要一行,并且只考虑连续几列 – YohanRoth
[Python Pandas sele最大值可能重复(http://stackoverflow.com/questions/20033111/python-pandas-max-value-of-selected-columns) – RomanPerekhrest