How to use dateadd() with the selectedvalue from a date slicer without errors

[wpf_]

I have matrix_2 where I want to take the date value from a slicer which filters matrix_1, and shows the values that is offset by -7 days.  So if showing values for Monday on matrix_1, I want matrix_2 to show values for the previous Monday.  

I am using dateadd(selectedvalue(table[transaction_date]), -7, day) but i am getting error: 

a function 'selectedvalue' has been used in a true/false expression that is used as a table filter expression. This is not allowed.  Hope someone can help. Thanks. 

[Ashish_Mathur]

Hi,

Ensure that you have a Calendar Table and the slicer has the Date column from this Calendar table.  This measure should work

=min(calendar[date])-7

Hope this helps.

[AllisonKennedy · Accepted solution]

Is Transaction Date the one in the slicer? DateAdd will accept the whole column, so you shouldn't need to use the SelectedValue function at all, but depends what else is going on with your relationships between matrix 2 data and transaction date.

[wpf_]

@AllisonKennedy 

Wow didn't know you can do that without the selectedvalue function. It worked, unfortunately it didn't help me with what I wanted to do. But thanks, it will help me down the road.  

[AllisonKennedy]

@wpf_ Glad you learned something new at least. Post a new question with some sample data and desired output and we can keep helping you get the final result you need.