WGMn returns a weekly geometric mean from a specified variable, Cx, beginning with the day of the week specified by n.
(For N=7, the week is Sunday through Saturday.) 

SYNTAX:

WGMn(Cx, optional Time Increment)
where :
n specifies the Week Definition, which determines the begining and end of the week.
Cx is a conditional variable x
Time Increment Optional - specifies the source variables (Cx) Frequency when the Source Variable (CX) and target variable's (i.e. the variable being calculated) frequencies do not match.

NOTES:

The result of the function is stored on the last day of the defined week (n).

Zero values are ignored by this function.

• To convert zeros to one, see WGMCn.
• To add one to all values, see WGMPn.

The result is stored based on target variables frequency:

• Daily - Last day of the month.
• Daily Detail - First slot on the last day of the month.

EXAMPLE 1: Return the Weekly geometric mean from a variable

Source variable (71) is set to Daily and Target variable (147) is also set to Daily. Because both the Source and Target variables are the same (Daily), the time increment BYDAY will be used.

V147 = WGM7(C71)

Variable 147 is the Weekly geometric mean (Sunday through Saturday, n = 7) of variable 71.  The sample calculation below also has WGMCn and WGMPn for comparison, the results for this example are highlighted in green:

EXAMPLE 2: Return the Weekly geometric mean from an Hourly variable into a Daily Calculation.

Source variable (71) is set to Hourly and Target variable (147) is set to Daily.

V71 - Is a hourly parameter
V147 - Is a daily calculation

V147 = WGM7(V71,BYHOUR)

Note: You MUST specify the Time Increment (BYHOUR) that matches the source variables frequency (IE the source variable V71 is Hourly, therefore we specify BYHOUR) in order for the function to return the correct value.

See: Working with Daily Detail Variables in Calculations.