Microsoft Office Tutorials and References
In Depth Information
Chapter 15: Performing Magic with Array Formulas
Summing the n largest values in a range
The following array formula returns the sum of the 10 largest values in a range named Data :
{=SUM(LARGE(Data,ROW(INDIRECT(“1:10”))))}
The LARGE function is evaluated 10 times, each time with a different second argument (1, 2, 3,
and so on up to 10). The results of these calculations are stored in a new array, and that array is
used as the argument for the SUM function.
To sum a different number of values, replace the 10 in the argument for the INDIRECT function
with another value.
If the number of cells to sum is contained in cell C17, use the following array formula, which uses
the concatenation operator (&) to create the range address for the INDIRECT function:
{=SUM(LARGE(Data,ROW(INDIRECT(“1:”&C17))))}
To sum the n smallest values in a range, use the SMALL function instead of the LARGE function.
Computing an average that excludes zeros
Figure 15-2 shows a simple worksheet that calculates average sales. The formula in cell B13 is
=AVERAGE(B4:B11)
Figure 15-2: The calculated average includes cells that contain a 0.
Two of the sales staff had the week off, however, so including their 0 sales in the calculated
average doesn’t accurately describe the average sales per representative.
The AVERAGE function ignores blank cells, but it does not ignore cells that contain 0.
 
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