comparing last year with this years latest month

[#1]

I got these two expressions

count({<year={'2013'},Stationsname ={'1','2','3'},Gruppe={'washers'} >}items)

count({<year={'2014'},Stationsname ={'1','2','3'},Gruppe={'washers'} >}items)

and then I filter on two fields month and dates to get the same month and same range of dates ex. 1. april to 8. april so I can

compare the two years and same periode month and days

I would like to avoid the filtering and incorporate somthing like max(month)) in the two expressions

something like this - but what about last year max(MONTH) year=2013 will give me december????????

count({<year={'2014'},MONTH={Max(MONTH)},Stationsname ={'1','2','3'},Gruppe={'washers'} >}items)

[#2]

Try like this

MaxMonth_CurYear = If(Year=Max(Year),Date(Max(DateField),'MMM')) or

                              = If(Year=Max(Year),Date(Max(DateField),'MM'))

                         //Dependson your Month field format (MMM/MM)

MaxMonth_PrevYear = If(Year=Max(Year)-1,Date(AddMonths(Date(Max(DateField),'DD/MM/YYYY'),-4),'MMM') or

                               = If(Year=Max(Year)-1,Date(AddMonths(Date(Max(DateField),'DD/MM/YYYY'),-4),'MMM')

                        //Dependson your Month field format (MMM/MM)

Ex: MaxMonth as per the maxdate is Apr then Date(AddMonths(Date(Max(DateField),'DD/MM/YYYY'),-4) will return Dec

After creating these variables and you can use these in set analysis