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484 Formula Functions Reference Appendix C
Statistical Functions
computes the total for each row of all revenue values for rows 1 through the current row number, filling
the calculated column with the cumulative totals of the revenue column.
Figure C.16 Example of the Summation function
Product (Π)
Evaluates for an explicit range of values in a column, as given by the summation indices, as opposed to
all other statistical functions (except Summation), which always evaluate on every row. Product uses the
notation shown in the formulas on the right in Figure C.17. To calculate a product, replace the missing
body term with an expression containing the index variable j. Product repeatedly evaluates the
expression for i = 1, i = 2, through i = n and multiplies the nonmissing results together to determine the
final result.
You can replace NRow(), the number of rows in the active spreadsheet and the index constant, i, with
any expression appropriate for your formula.
For example, the expression second product example in Figure C.17 calculates i! (each row number’s
factorial).
Figure C.17 Examples of the Product Function
Minimum and Maximum
Return the minimum and maximum value, respectively, from the list of nonmissing arguments you
specify.
N Missing
Counts the number of missing values in the list of arguments you specify.
Desirability
Are smooth piecewise functions that are crafted to fit the control points. The minimize and maximize
functions are three-part piecewise smooth functions that have exponential tails and a cubic middle.
The target function is a piecewise function that is a scale multiple of a normal density on either side of
the target (with different curves on each side), which is also piecewise smooth and fit to the control
points.