CumSum

返回矩阵/矢量元素的累积总和，包括沿给定轴的元素。

vector vector::CumSum();



vector matrix::CumSum();



matrix matrix::CumSum(

  const int  axis      // axis

   );

参数

axis

[输入] 轴。 0 — 水平轴，1 — 垂直轴。

返回值

沿给定轴的元素的累积总和。

举例

   matrix matrix_a={{10,3,2},{1,8,12},{6,5,4},{7,11,9}};

   Print("matrix_a\n",matrix_a);



   matrix cols_cumsum=matrix_a.CumSum(0);

   matrix rows_cumsum=matrix_a.CumSum(1);

   vector cumsum_values=matrix_a.CumSum();



   Print("cols_cumsum\n",cols_cumsum);

   Print("rows_cumsum\n",rows_cumsum);

   Print("cumsum values  ",cumsum_values);



   /*

   matrix_a

   [[10,3,2]

    [1,8,12]

    [6,5,4]

    [7,11,9]]

   cols_cumsum

   [[10,3,2]

    [11,11,14]

    [17,16,18]

    [24,27,27]]

   rows_cumsum

   [[10,13,15]

    [1,9,21]

    [6,11,15]

    [7,18,27]]

   cumsum values  [10,13,15,16,24,36,42,47,51,58,69,78]

   */