Returning a different value based on duplicates

[kimberlyrose1x]

Hello, all...I am thankful you exist. 🙂

Here is my issue:

I am trying to do a pie chart that compares number of arrests where a mental health flag is present vs. when it is not.

I have duplicate rows if the arrest was for a person who had more than one type of flag.

Currently, I am using Count(Distinct) in the visualization filter so that an arrest is only considered once, however, it is counting one "Yes" and one "No" for each arrest number.

What I am looking for is a way in DAX to have the first instance of a duplicate that meets a condition say 'Yes' and any following values be blank if they are the same arrest number. That way I can filter out the blank values.

I currently have a simple IF statement: IF(table[column] = "MH", "Yes", "No") which returns: 

Arrest #	Flag	MH Flag
1	MH	Yes
1	HXS	No
1	FEL	No
2	FEL	No
3	HXS	No

I would like a DAX expression that returns the following based on the duplicate arrest numbers (Thank you so much in advance!):

Arrest #	Flag	MH Flag
1	MH	Yes
1	HXS	(Blank)
1	FEL	(Blank)
2	FEL	No
3	HXS	No

[kimberlyrose1x]

tamerj1,

You are a genius beyond measure. It worked. Thank you so much!!

Crystal

[tamerj1 · Accepted solution]

Hi @kimberlyrose1x 

Please try

MH Flag =
IF (
"MH"
IN CALCULATETABLE (
VALUES ( 'Table'[Flag] ),
ALLEXCEPT ( 'Table', 'Table'[Asset #] )
),
IF ( 'Table'[Flag] = "MH", "Yes" ),
"No"
)