Variable not working correctly in measure

[dphillips]

I am using a variable in a measure to find which item is selected in a slicer. The variable is called ResultGroupNumber. I want this to be calculated based on the value in the slicer. If I test the ResultGroupNumber and calculate it and then add it to a card I get the number 9 which is correct for the current value in the slicer. Here is my formula I am using below. Basically, I am trying to find the average of a students results for all resultgroups which are less than the current one selected

LPAveLongTerm = 
    var ResultGroupNumber = calculate(max('Result Group Table'[Sort Order]),allexcept('Result Group Table','Result Group Table'[Result Group]))
RETURN
calculate(AVERAGE(uncRedshift_Studentresults[LPResult]),filter(all('Result Group Table'),'Result Group Table'[Sort Order] < ResultGroupNumber),allexcept(uncRedshift_Studentresults,uncRedshift_Studentresults[NameNum],uncRedshift_Studentresults[ResultType]))

 When I use the variable I get 

However, if I remove the variable and use the constant 9 like this

LPAveLongTermV2 = 
    var ResultGroupNumber = calculate(max('Result Group Table'[Sort Order]),allexcept('Result Group Table','Result Group Table'[Result Group]))
RETURN
calculate(AVERAGE(uncRedshift_Studentresults[LPResult]),filter(all('Result Group Table'),'Result Group Table'[Sort Order] < 9),allexcept(uncRedshift_Studentresults,uncRedshift_Studentresults[NameNum]))

I get the second column which is what I am after.

How can I get the slicer to determine the variable rather than hard coding a number in?

Any help would be appreciated.

[v-lili6-msft · Accepted solution]

HI  @dphillips 

For your case, it likes measure totals problem. Very common. See this post about it
https://community.powerbi.com/t5/DAX-Commands-and-Tips/Dealing-with-Measure-Totals/td-p/63376

or
https://community.powerbi.com/t5/Quick-Measures-Gallery/Measure-Totals-The-Final-Word/m-p/547907

In your case, you want to use the total of ResultGroupNumber as a variable in the measure,

but for different rowcontext in the visual, it won't use the total of ResultGroupNumber,

so for your case, you could adjust the formula as below:

LPAveLongTerm =
var ResultGroupNumber = calculate(max('Result Group Table'[Sort Order]),all('Result Group Table'))
RETURN
calculate(AVERAGE(uncRedshift_Studentresults[LPResult]),filter(all('Result Group Table'),'Result Group Table'[Sort Order] < ResultGroupNumber),allexcept(uncRedshift_Studentresults,uncRedshift_Studentresults[NameNum],uncRedshift_Studentresults[ResultType]))

or

LPAveLongTerm =
var ResultGroupNumber = calculate(max('Result Group Table'[Sort Order]),allselected('Result Group Table'))
RETURN
calculate(AVERAGE(uncRedshift_Studentresults[LPResult]),filter(all('Result Group Table'),'Result Group Table'[Sort Order] < ResultGroupNumber),allexcept(uncRedshift_Studentresults,uncRedshift_Studentresults[NameNum],uncRedshift_Studentresults[ResultType]))

Regards,

Lin

[dphillips]

Thanks @v-lili6-msft  - that seems to do just what I wanted. Thanks for your help.

[az38]

@dphillips 

First, try to debug your variable like

LPAveLongTermV2 = 
    var ResultGroupNumber = calculate(max('Result Group Table'[Sort Order]),allexcept('Result Group Table','Result Group Table'[Result Group]))
RETURN
ResultGroupNumber 

The issue is not in variable usage but in its formula 

[dphillips]

Yep - I did test that the variable was correct by using the formula for the variable on its own like you have done. I put this measure in a card and it gives me a whole number which represents the result group I am looking for. When I change the slicer, the variable also changes so that seems to be all correct. 

[az38]

@dphillips 

so, the issue in the very first post is still actual?

[dphillips]

Yes, it works when I use an actual integer, but when I use the variable it does not.