python - 将字符串列添加到浮点矩阵 NumPy

Question

我正在寻找一种方法，将一列浮点值添加到字符串值矩阵中。

Mymatrix = 
[["a","b"],
 ["c","d"]]

我需要一个像这样的矩阵=

[["a","b",0.4],
 ["c","d",0.6]]

Answer 1

我建议使用 pandas改为 DataFrame:

import pandas as pd

df = pd.DataFrame([["a","b",0.4],
                   ["c","d",0.6]])

print(df)

   0  1    2
0  a  b  0.4
1  c  d  0.6

您还可以指定列(Series)名称:

df = pd.DataFrame([["a","b",0.4],
                   ["c","d",0.6]], columns=['A', 'B', 'C'])
df
   A  B    C
0  a  b  0.4
1  c  d  0.6