MAX value matching multiple criteria

[mwd]

Hi

I have a spreadsheet that contains text and time information such as below:
a b c
1 north high 5:21
2 south low 6:42
3 north low 7:14
4 north high 3:56
5 east low 2:14
6 north low 2:02
7 north high 2:37
All of the information in the spreadsheet is the result of formulas from
other data (in other sheets).
I need a formula that will provide the maximum time (in Col C) in a row
where (for example) the Col A is "north" and Col B is "high".
Any help would be greatly appreciated.
Thanks.

 

[Gary''s Student]

=SUMPRODUCT(MAX((A1:A7="north")*(B1:B7="high")*C1:C7))

 

[BoniM]

Add a header row to your data:
Compass Level Time
north high 5:21
south low 6:42
north low 7:14
north high 3:56
east low 2:14
north low 2:02
north high 2:37

Create a criteria range:
Compass Level
north high
In this formula, I used E1:F2 for the criteria range.

Enter formula:
=DMAX(A1:C8,3,E1:F2)

 

[BoniM]

DMAX makes it easy to change criteria to find other combinations of values...
But you could also use the following array formula:
=MAX(C2:C8*((A2:A8="north")*(B2:B8="high")))
Enter as array with ctrl+shift+enter

 

[Teethless mama]

=MAX(INDEX((A1:A7="north")*(B1:B7="high")*C1:C7,0))

 

[Ragdyer]

Just as a point of information, can anyone out there with access to Fast
Excel or other similar software determine which of these formulas would be
faster and less resource intensive?

Say you size them to 7,000 rows.

Gary's Sumproduct:
=SUMPRODUCT(MAX((A1:A7000="north")*(B1:B7000="high")*C1:C7000))

Tm's Index:
=MAX(INDEX((A1:A7000="north")*(B1:B7000="high")*C1:C7000,0))

OR, a standard *array* entered formula:
=MAX((A1:A7000="north")*(B1:B7000="high")*C1:C7000)

 

[T. Valko]

http://img158.imageshack.us/img158/5620/calctimesme8.jpg

Times based on Charles Williams RangeTimer method:

http://msdn2.microsoft.com/en-us/library/aa730921.aspx

 

[Ragdyer]

Thanks for your effort in this Biff.

I had a suspicion that perhaps that Index formula might be the fastest, but
I can see I was way off.

Good old Sumproduct appears to be a steady, all-around, workhorse choice.

 

[BoniM]

7000 rows, 10 iterations

DMAX Array Index Sumproduct
0.000174949 0.000173458 0.000173570 0.000175497 Average
0.000180749 0.000177117 0.000185778 0.000188013 Max
0.000171530 0.000169575 0.000169575 0.000170133 Min
0.000009219 0.000007542 0.000016203 0.000017880 Range

Array had the lowest average, tied with Index for the lowest min, and was
the most consistent, with the lowest range.
Sumproduct had the highest average, the highest max and was the least
consistent, with the largest range.


Data:
DMAX Array Index Sumproduct
0.000171530 0.000169854 0.000169854 0.000171530
0.000179911 0.000176838 0.000172927 0.000170133
0.000172089 0.000173486 0.000171530 0.000174324
0.000174993 0.000172648 0.000172368 0.000178794
0.000180749 0.000174603 0.000169575 0.000173206
0.000171530 0.000172368 0.000172927 0.000175162
0.000172089 0.000173486 0.000185778 0.000172368
0.000174603 0.000177117 0.000175721 0.000177676
0.000175162 0.000169575 0.000172089 0.000188013
0.000176838 0.000174603 0.000172927 0.000173765

 

[T. Valko]

Those look like recalculaion times. I get similar results when I test the
recalculation time.

I tested the *initial* calculation times.

 

[BoniM]

DMAX Array Index Sumproduct
0.0240969 0.0240885 0.0243997 0.0243215
0.0127678 0.0128463 0.0129556 0.0126991
0.0128880 0.0128690 0.0126720 0.0128310
0.0127262 0.0127622 0.0129514 0.0129377
0.0239782 0.0129301 0.0126226 0.0243023
0.0127907 0.0244173 0.0242073 0.0127064
0.0126882 0.0126583 0.0127625 0.0127427
0.0126734 0.0129637 0.0127756 0.0129603
0.0241332 0.0126843 0.0127209 0.0243031
0.0127002 0.0127251 0.0127625 0.0126938

0.0161443 0.0150945 0.0150830 0.0162498 Average

0.0241332 0.0244173 0.0243997 0.0243215 Max
0.0126734 0.0126583 0.0126226 0.0126938 Min
0.0114598 0.0117590 0.0117772 0.0116277 Range

testing *initial* calculations
I'm sorry - I should have been specific about what was being tested...