Month minus previous month

[#1]

Hi,

first post so be gentle please

I have a data structure with numerous lines which I sum up against a calendar day/week/month as required..

Now in one specific chart I have the sums per month for all history.. I would like to have another column with the delta of X against month X-1 .

I have the previous month in as a value in the table structure, created with date((MonthStart)-1, 'MM/YYYY')

but how do I get the previous months numbers to display in the current months row..

thank you

[#2]

OK.. I have found the range sum and got this working...

next, I have only have 1 dimension..

how can I have 2 or 3 dimension??

[#3]

Try a master calender with a AsOfMonth field

f.e. a AsOfYear Table

Kalender:
LOAD * INLINE "

Year, AsOfYear, Periodtype
2000, 2000, Current
2001, 2001, Current
2001, 2000, Previous
2002, 2001, Previous

"

[#4]

Hi Chris,

Can you share an example QVW?  I'm not sure I understand your requirements

[#5]

OK.

I have a chart, Dimension = YearMonth and expression = count(Amount)

next I wanted to add another expression to calculate the difference between each month and the month previous.

I think I can do this with the expression...

count(Amount) - RangeSum(Above(count(Amount),-1,1))

What I am struggling with is adding in a additional dimension (Category), as if I do this, the expression fails.

thank you

[#6 · Accepted solution]

Okay.  Try this instead of your range expression

count(Amount)-Above(Count(Amount))

This will populate the cells when you add Category.  You will then want to sort the chart so the expression works the way you need it.  For example, if you need the change for each product over time, sort by product - text A->Z

[#7]

Thank you Caleb