How to load member for "sales same date last year"?

Question

I need to load a member in Measures named "PriorYrSales" with "Sales" for the same date last year as today's date. Thus, retrieving "PriorYrSales" for 2/10/2002 would return the sales amount for 2/10/2001. Since days roll-up to months, quarters, years, it would be easy to determine how we're doing compared to the same time last year.Data is loaded each day for a date range from the current date and the preceding x days. Substitution variables are available for the beginning and ending date and the same dates for last year.For example: Data is loaded from beginning date of 2/01/2002 through ending date of 2/10/2002.The prior year date variables contain 2/01/2001 and 2/10/2001.The time period dimension is as follows:FY01->Jan2001-->01012001 (Alias: 1/01/2001)-->01022001 (Alias: 1/02/2001)-->all the dates in Jan->Feb2001-->02012001 (Alias: 2/01/2001)-->02022001 (Alias: 2/02/2001)-->all the dates in Febetc.FY02->Jan2002-->01012002 (Alias: 1/01/2002)-->01022002 (Alias: 1/02/2002)-->all the dates in Jan->Feb2002-->02012002 (Alias: 2/01/2002) -->02022002 (Alias: 2/01/2002)-->all the dates in Febetc.Thanks your any and all suggestions.Phil

Answer 1

Perhaps I wasn't clear in the first post. The intent is to easily compare sales for a current date/period to the same date/period last year. Neither Excel nor Analyzer provide a method that I'm aware of to retrieve data as follows:-------------------------------------Period Sales PriorYrSales Diff4/15/2002 1,000 900 100-------------------------------------(900 is sales for 4/15/2001)(100 is the calculated difference.)Nor can I do this:-------------------------------------Period Sales Period Sales Diff4/15/2002 1,000 4/15/2001 900 100-------------------------------------What Excel and Analyzer do allow is:-------------------------------------Period Sales 4/15/2002 1,0004/15/2001 900-------------------------------------I readily acknowledge that the data is redundant but I can't think of another option that will allow Excel and Analyzer to easily retrieve the values for comparison. If the PriorYrSales member can be loaded then the users can compare years, quarters, months and days quite easily.My challenge is knowing how use a calc script to derive prior year dates that correspond to current year dates. Something like:PriorYrSales->04152002 = Sales->04152001I've considered arrays but I've never used them and the documentation is not helpful enough for me.Thanks for your response.Phil