a -0.009746
b 0.166915
d 0.501380
dtype: float64
print(data["a"])
1 -0.969632
2 0.048717
3 -0.009746
dtype: float64
a 1 -0.969632
2 0.048717
3 -0.009746
b 1 -0.465073
2 -0.081744
3 0.166915
c 1 0.047626
2 0.502608
dtype: float64
print(data["a" : "c"])
print(data[:, 3])