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How to Average a Group Maximum Values

Posted on 2011-03-25
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Last Modified: 2012-05-11
I have a report that is grouped on a LoadID field (multiple rows per LoadID, each row containing a Mileage field).  For each LoadID group, I use a running total to display the maximum Mileage for that LoadID.

Now, in the footer of the report, I want to put in the average of these Maximum values (i.e. average the maximum Mileage for each LoadID). I can't use a running total or a summary field on the running total field that I used to display the maximum mileage per load, as per Crystal capabilities.  

Any suggestions/questions?
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Question by:jhardwood
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3 Comments
 
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mlmcc earned 500 total points
ID: 35215388
You will need to use a manual average using formulas and variables.

In the report header add a formula to declare the variables
WhilePrintingRecords;
Global NumberVar RecCount;
Global NumberVar MileageTotal;
""

In the group footer add a formula to calculate the total
WhilePrintingRecords;
Global NumberVar RecCount;
Global NumberVar MileageTotal;
RecCount := RecCount + 1;
MileageTotal := {&MaxRunningTotal};
""

In the report footer add a formula to calculate and display the average
WhilePrintingRecords;
Global NumberVar RecCount;
Global NumberVar MileageTotal;
If RecCount > 0 then
    MileageTotal / RecCount
Else
    0

mlmcc
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Author Comment

by:jhardwood
ID: 35217249
Excellent!  Worked Great!  I id have to change the MileageTotal calculation in the group footer formula to

MileageTotal := MileageTotal + {&MaxRunningTotal}

Without that change, the MileageTotal was alwas equal to the value of the last row.

Thanks again!
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LVL 100

Expert Comment

by:mlmcc
ID: 35217328
Sorry.  Typing too fast.

mlmcc
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