如何在python中将列逐一放置以形成矩阵

# 假设有三个列向量
col1 = [1, 2, 3]
col2 = [4, 5, 6]
col3 = [7, 8, 9]

# 使用列表推导式形成矩阵
matrix = [col1, col2, col3]

# 打印矩阵
for row in matrix:
    print(row)

import numpy as np

# 创建列向量
col1 = np.array([1, 2, 3])
col2 = np.array([4, 5, 6])
col3 = np.array([7, 8, 9])

# 使用np.column_stack将列向量组合成矩阵
matrix = np.column_stack((col1, col2, col3))

# 打印矩阵
print(matrix)

import pandas as pd

# 创建列向量
col1 = [1, 2, 3]
col2 = [4, 5, 6]
col3 = [7, 8, 9]

# 使用pd.DataFrame将列向量组合成矩阵
matrix = pd.DataFrame({'col1': col1, 'col2': col2, 'col3': col3})

# 打印矩阵
print(matrix)