g_prod(G;S;X)
Returns the product of values within a given group.
Function type
Vector only
Syntax
g_prod(G;S;X)
Input
Argument | Type | Description |
---|---|---|
G |
any | A space- or comma-separated list of column names Rows are in the same group
if their values for all of the columns listed in If If any of the columns listed in |
S |
integer | The name of a column in which every row evaluates to a 1 or 0, which determines
whether or not that row is selected to be included in the calculation If
If any of the values in
|
X |
any numeric type | A column name N/As
in |
Return Value
For every row in each group defined by G
(and for those rows where
S
=1, if specified), g_prod
returns a decimal value corresponding to the product of the values in the column listed in
X
that are in the same group as that row.
If all values for a particular group are N/A, the result is 1.
Sample Usage
<base table="pub.doc.samples.ref.func.g_func_sample_usage"/> <willbe name="g_prod_1" value="g_prod(state;include;value)"/> <willbe name="g_prod_2" value="g_prod(state city;include;value)"/>