product

product, function

def autodiff process product(a: number): number

Returns the product of the grouped numbers in a.

• a: the numbers to multiply.

Example

table T = with
  [| as A, as G |]
  [| 2, "a" |]
  [| 3, "a" |]
  [| 2, "b" |]
  [| 0, "b" |]

table G[gdim] = by T.G

show table "Product by group" with
  gdim
  product(T.A) as "Product"
  group by gdim

This outputs the following table:

Remarks

The aggregator returns 1 on empty groups.

See also

• * operator