CumProd

返回矩阵/向量元素的累积乘积，包括沿给定轴的累积乘积。

vector vector::CumProd();

vector matrix::CumProd();

matrix matrix::CumProd(
const int axis // axis
);

参数

axis

[输入] 轴。 0 ― 每列的水平轴（即，整行），1 ― 每行的垂直轴（即，整列）

返回值

元素沿给定轴的累积乘积。

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_cumprod=matrix_a.CumProd(0);
   matrix rows_cumprod=matrix_a.CumProd(1);
   vector cumprod_values=matrix_a.CumProd();

   Print("cols_cumprod\n",cols_cumprod);
   Print("rows_cumprod\n",rows_cumprod);
   Print("cumprod values  ",cumprod_values);

   /*
   matrix_a
   [[10,3,2]
    [1,8,12]
    [6,5,4]
    [7,11,9]]
   cols_cumprod
   [[10,3,2]
    [10,24,24]
    [60,120,96]
    [420,1320,864]]
   rows_cumprod
   [[10,30,60]
    [1,8,96]
    [6,30,120]
    [7,77,693]]
   cumprod values  [10,30,60,60,480,5760,34560,172800,691200,4838400,53222400,479001600]
   */

CumSum

Percentile