Calculate the product along an axis

rray_prod() computes the product along a given axis or axes. The dimensionality of x is retained in the result.

rray_prod(x, axes = NULL)

Arguments

x	A vector, matrix, or array to reduce.
axes	An integer vector specifying the axes to reduce over. 1 reduces the number of rows to 1, performing the reduction along the way. 2 does the same, but with the columns, and so on for higher dimensions. The default reduces along all axes.

Value

The result of the reduction as a double with the same shape as x, except along axes, which have been reduced to size 1.

See also

Other reducers: rray_max, rray_mean, rray_min, rray_sum

Examples

x <- rray(1:10, c(5, 2))

rray_prod(x)
#> <rray<dbl>[,1][1]>
#>         [,1]
#> [1,] 3628800

rray_prod(x, 1)
#> <rray<dbl>[,2][1]>
#>      [,1]  [,2]
#> [1,]  120 30240

rray_prod(x, 2)
#> <rray<dbl>[,1][5]>
#>      [,1]
#> [1,]    6
#> [2,]   14
#> [3,]   24
#> [4,]   36
#> [5,]   50