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Calculating Subsummaries with Functions

Hi, I have a database of patient surveys, which I created in Filemaker Pro 6 and upgraded to Filemaker Pro 7.

When I viewed the new version of the database, I came across a problem apparently caused during the upgrade.  In my Report, some fields are based on the results of calculations from other fields.

For example (Responses are ranked 1 to 5--1 being bad, and 5 being good):

Admission:                Avg. Response
Staff Courtesy            3.0
Delays                       2.0
Total                         2.5

In a Grand Summary Report, the above example works fine in both FM 6 and 7.

In the above example, Total = Average (Staff Courtesy, Delays)

However, I have problems if I use sub-summaries when evaluating Total.

In FM 6, the subsummaries work without problem when calculating Total; in FM 7, however, I get the average for ALL records in the database (i.e. the subsummary is not working).

The formula I am using is:

FM6:
Total = Average(GetSummary(Staff Courtesy, Survey Date), GetSummary(Delays, Survey Date))

FM 7:
Total = Average(GetSummary(Staff Courtesy; Survey Date); GetSummary(Delays; Survey Date))

In each case, the records are sorted according to Survey Date.  


I should also add:  

Subsummaries NOT involving functions DO work in my FM 7 database.

For example, the following formula would work in my subsummary report:
Number of Patients = GetSummary(Patients Group A, Survey Date) + GetSummary(Patients Group B, Survey Date)

My problem seems to happen only when I use functions (such as Average) with parameters requesting a SubSummary.

Is it at ALL possible for me to calculate an Average using subsummaries in FM 7?  Any thoughts or guidance would be MOST appreciated!
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tonyt1234567
Asked:
tonyt1234567
1 Solution
 
KungFoolioCommented:
Tony,

You can't use calculations in the GetSummary function: Getsummary(SummaryField,BreakField). SummaryField is tytpe Summary.

1) Peform the average as a calculation of the fields desired. Average1 = Average(Field1,Field2,...)
2) Then define a summary (SumAverage1) field that takes the average (across all records) of Average1. Use this field to show averages for your found set.
3) To break this into subsummaries, use Getsummary(SumAverage1,SurveyDate)

Cheers.

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tonyt1234567Author Commented:
KF, that did it!!  Thanks VERY much for your guidance.

One other question--I'm not sure why having a calculation within a subsummary worked in FM 6, but not FM 7.  Is this a difference between the programs, or was I just lucky in FM 6 (or both?)

Tony
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