Percent of totals within a group problem

[dxwallace]

Can someone help me a novice with how to do this?

I have a list object grouped where my data will give three separate groups based on the data. I am trying to have a column that represents the percentage of another column's numerical value relative to just the group, not the percentage of the all three groups. Let me try to illustrate below.

For each line below, the percentage should be 50%, because the data value is 50% of the group as opposed yo 16.67% of everything which I am currently getting because my percentage field is
percent(valuefld) * 100. How do I do this at the group level?
                   
                  valuefld       percent     
Group  a          50          16.67      [should be 50%)
Group  a          50          16.67

Group  b          50          16.67
Group  b          50          16.67

Group  c           50          16.67
Group  c           50          16.67
                      300
                           

[MDXpressor]

You could try creating a calc to summarize the data to the group level, then base your percentage on that column.

[Group Sum]:
total([valuefld] for [group])

[Percentage]:
[valuefld]/[Group Sum]

[dxwallace]

I took the "chumps" way out on this one.  I basically separated the three groups into three different queries on 3 different pages, thus allowing each group summary to total independently as a separate page query.

[MDXpressor]

No such thing as the 'Chumps' way as long as you didn't underdeliver to the client.  Creativity provides many paths to the same destination.

[Desperado]

I think u cannnot use total and for in the group sum calc....
you have to use aggregate if you want to use "for "
[Group Sum]:
aggregate([valuefld] for [group])

[dxwallace]

I hear you MDXpressor, there are several ways to skin a cat, I just wnat to make sure I am learning as I go all the ways Cognos can do something, because in the future I might not be able to separate the three gropus into three separate queries and I perfer to know as much as i can

[MDXpressor]

I think u cannnot use total and for in the group sum calc....
you have to use aggregate if you want to use "for "
[Group Sum]:
aggregate([valuefld] for [group])

Not sure where you got this, but I use Total...for quite frequently, so I am pretty sure you can.