Having problems with calculated dimensions

[#1]

Hello,

I'm trying to create a bar chart that will show the number of invoices per the frequency of days between order and delivery.

E.g. if the order was placed on the 1/1/2010 and was delivered on the 4/1/2010 then the number of days between order and delivery is = 3

What I want my barchart to show is the frequency per days between order and delivery.

|
| x (how many invoices)
| x
| x x
| x x x
| x x x
| x__x__x______________

1 2 3 (days between order and invoice

At the moment my dimension is:

=Aggr(Sum(Invoicedate-Orderdate))

but this is not working (error in dimension)

My expression is:

Count (DISTINCT InvoiceNo)

It seems that QV want's me to add something here

=Aggr(Sum(Invoicedate-Orderdate),MORE CODE IS NEEDED HERE)

but I do not have any ideas.

Anyone that has any ideas?

br

Martin

[johnw]

Are Invoicedate and Orderdate both on the same table?

I would just calculate a new field, Invoicedate-Orderdate as DaysToInvoice, and use it as the dimension.

If you really want to calculate the duration on the fly in the chart, then I think your calculated dimension would simply be Invoicedate-Orderdate, no aggr(), no sum(), nothing complicated.

[#3]

Aggr is used to summarize by a dimension : Aggr( sum( ) , dimension)

In your example, i suspect you don't need aggr. Try just Invoicedate-Orderdate for your dimension.

JJJ