您可以DataFrame.interpolate用来获取线性插值。
In : df = pandas.DataFrame(numpy.random.randn(5,3), index=['a','c','d','e','g'])
In : df
Out:
0 1 2
a -1.987879 -2.028572 0.024493
c 2.092605 -1.429537 0.204811
d 0.767215 1.077814 0.565666
e -1.027733 1.330702 -0.490780
g -1.632493 0.938456 0.492695
In : df2 = df.reindex(['a','b','c','d','e','f','g'])
In : df2
Out:
0 1 2
a -1.987879 -2.028572 0.024493
b NaN NaN NaN
c 2.092605 -1.429537 0.204811
d 0.767215 1.077814 0.565666
e -1.027733 1.330702 -0.490780
f NaN NaN NaN
g -1.632493 0.938456 0.492695
In : df2.interpolate()
Out:
0 1 2
a -1.987879 -2.028572 0.024493
b 0.052363 -1.729055 0.114652
c 2.092605 -1.429537 0.204811
d 0.767215 1.077814 0.565666
e -1.027733 1.330702 -0.490780
f -1.330113 1.134579 0.000958
g -1.632493 0.938456 0.492695
602392714
清零编程群