Calculate countax vs counta

[MLinux]

I need your clarification I've table and I need to count all contents include numbers and text on specific column with specific condition

When use calculate(countax(Roster[today shift]), Age < 34) it gives me wrong result while calculate(counta(Roster[today shift], Age < 34) give right one what's the difference between them in this case?

I think I still don't understand filter concept in dax

[v-yaningy-msft · Accepted solution]

Hi, @MLinux 

According to your description, Here is why using calculate(countax(Roster[today shift])), Age < 34) gives different results,

Assuming that the calculation context is the same for both measures

1.calculate(counta(Roster[today shift], Age < 34)) counts the number of rows with non-null values in the today shift column where the age column is less than 34 in the current calculation context.

2. calculate(countax(Roster[today shift])), Age < 34) counts the number of non-blank rows in the Age < 34 column iterated over Roster[today shift] in the current calculation context.

Related Links:

Context in DAX Formulas - Microsoft Support

DAX Power BI: Iterative X-Functions (SUMX, AVERAGEX, COUNTX) | by Andrei Khaidarov, PhD | Power Plat...

Best Regards,
Yang
Community Support Team

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[MLinux]

Thx for your help

what I notice that when use iterative x function within filter function such as calculate it will ignore the filter if it happen in same table so in this case normal function like counta is right choice for my case

[Alex25]

This both makes sense and makes my head hurt

[MLinux]

I think may because we've misunderstanding for filter and x-function behaviour