column sum of a matrix

例句：

1. 1. The column sum of the matrix is calculated using a specific formula.
   矩阵的列和通过特定的公式计算。
2. 2.The column sum of the data was used to determine the optimal solution.
   数据列和被用来确定最优解。
3. 3. The column sum of the table provides an overview of the data distribution.
   表格的列和提供了数据分布的概览。