Microsoft Office Tutorials and References
In Depth Information
Megaformula Examples
3. Replace the two references to range D5:D20 with the array formula contained in D5:20.
Doing so results in the following array formula in cell G1:
{=IF(MOD(SUM(INT((B5:B20*C5:C20/10)+MOD((B5:B20*C5:C20),
10))),10)=0,”VALID”,”INVALID”)}
4. Replace the references to cell C5:C20 with the array formula in C5:C20.
Note that you must have a set of parentheses around the copied formula text. The result
is as follows:
{=IF(MOD(SUM(INT((B5:B20*(MOD(ROW(INDIRECT(“1:16”)),
2)+1)/10)+MOD((B5:B20*(MOD(ROW(INDIRECT(“1:16”)),2)+1)),
10))),10)=0,”VALID”,”INVALID”)}
5. Replacing the references to B5:B20 with the array formula contained in B5:B20 yields the
following:
{=IF(MOD(SUM(INT((MID(\$F\$2,A5:A20,1)*(MOD(ROW(INDIRECT
(“1:16”)),2)+1)/10)+MOD((MID(\$F\$2,A5:A20,1)*(MOD(ROW
(INDIRECT(“1:16”)),2)+1)),10))),10)
=0,”VALID”,”INVALID”)}
6. Substitute the array formula in range A5:A20 for the references to that range.
The resulting array formula is as follows:
{=IF(MOD(SUM(INT((MID(\$F\$2,ROW(INDIRECT(“1:16”)),1)*(MOD(ROW
(INDIRECT(“1:16”)),2)+1)/10)+MOD((MID(\$F\$2,ROW(INDIRECT
(“1:16”)),1)*(MOD(ROW(INDIRECT(“1:16”)),2)+1)),10))),10)=0,
“VALID”,”INVALID”)}
7. Substitute the formula in cell F2 for the two references to cell F2.
After making the substitutions, the formula is as follows:
{=IF(MOD(SUM(INT((MID(REPT(“0”,16–LEN(F1))&F1,
ROW(INDIRECT(“1:16”)),1)*(MOD(ROW(INDIRECT(“1:16”)),2)+1)/
10)+MOD((MID(REPT(“0”,16–EN(F1))&F1,ROW(INDIRECT(“1:16”)),
1)*(MOD(ROW(INDIRECT(“1:16”)),2)+1)),10))),10)=0,”VALID”,
“INVALID”)}
You can delete the now superfluous intermediate formulas. The final megaformula, a mere 229
characters in length, does the work of 51 intermediary formulas!
Generating random names
The final example is a useful application that generates random names. It uses three name lists,
compiled by the U.S. Census Bureau: 4,275 female first names; 1,219 male first names; and 18,839

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