2 Replies Latest reply on Jul 31, 2014 7:23 AM by RbnRbrts

    'Average' of a 'calculation' field in a 'subsummary'???



      'Average' of a 'calculation' field in a 'subsummary'???


           I have a report where I would like to get the average of numeric result from a calculation field. The calculation field falls within the Body of the layout and the 'average' (that I am looking to be determined) of the Calculation field I would like to fall in the Sub Summary section.

           Is this confusing enough???

           Thanks in advance....


        • 1. Re: 'Average' of a 'calculation' field in a 'subsummary'???

               This seems simple enough, but averages sometimes have picky details that keep them from being quite so simple.

               The immediately obvious answer is to define a summary field to compute the average of that calculation field and then place it in the sub summary layout part.

               Summary fields placed in sub summary layout parts display results based on the set of records grouped with that sub summary layout part.

               Picky details that can make averages more complex:

               FileMaker Average summary fields and average aggregate function do not count missing values as zero. The average of 3, <empty>, 3 will be 3 (6 divide by 2), not 2 (6 divide by 3).

               Averages sometimes need to be weighted averages

          • 2. Re: 'Average' of a 'calculation' field in a 'subsummary'???

                 Thank you Phil - you've done it again! It has taken awhile for me to get back to this issue but am happy to say, with your suggested method, 'the report now works just fine'. The addition of a summary field, changes to the layout then minor tweeking took all of about 15 minutes!

                 The summary information now provided is powerful and yet zero additional work is now required. I've included an image of the resulting page....


                 Thanks again!!