How to create a segment with a measure depending on another segment?

Hi AnthonyXelya - create a measure that dynamically calculates the age

Society_Age_In_Years =
VAR SelectedDate = MAX(Calendrier[Date])
RETURN
DATEDIFF(
SELECTEDVALUE('Entités'[Date_de_création]),
SelectedDate,
YEAR
)

this time, we’ll create a disconnected table that contains the age groups.This table is not connected to your main data model but will be used as a slicer

AgeGroups =
DATATABLE(
"AgeGroup", STRING,
{
{"Less than 1 year"},
{"Between 2 and 5 years"},
{"More than 5 years"}
}
)

create a measure that determines whether each society falls based on age group:

Selected_Age_Group =
VAR AgeInYears = [Society_Age_In_Years]
VAR SelectedGroup = SELECTEDVALUE(AgeGroups[AgeGroup])
RETURN
SWITCH(
TRUE(),
SelectedGroup = "Less than 1 year" && AgeInYears < 1, 1,
SelectedGroup = "Between 2 and 5 years" && AgeInYears >= 2 && AgeInYears <= 5, 1,
SelectedGroup = "More than 5 years" && AgeInYears > 5, 1,
0
)

In your table or matrix visual or choosen visual, add a filter where Selected_Age_Group equals 1. This will dynamically filter the societies based on the selected age group from the slicer.

Finally, add the AgeGroups[AgeGroup]  column to a slicer. When you select an age group in the slicer, your visual will dynamically show societies that fall within that age group based on the selected date.

hope this time it works. please check and confirm