Legend column changes displayed data

[sguenther]

Hey guys,

so I just discovered something in my reports and can't solve it. I have a table in which all actions for all users on my website are logged. So I have the following columns: userID, timestamp, action

What I want to know is the number of Monthly active users for each month. I set up a datetable and linked it via the timestamp (doesn't really matter because the problem also happens without a seperate datetable). The Monthly active users are calculated via:

Active Users = DISTINCTCOUNT(Table1[UserID])

Then I just drag in the Month column from my Datetable and the "Active Users" Measure. Looks like this:

 

So I looks fine. Now I wanted to know how long the users were registered on the website. So I calculated a new column in this table and defined some age brackets. The Table1 is also linked to a users table (through UserID) from which I got the signup date. Now I have an additional "User Age" column in Table1 with values like (1 day, 2-3 days, ...).

As soon as I drag the User Age column in the Legend of my initial visualization the values change:

The green line chart shows the initial values as in the chart above. I have no idea by what this is caused. Must have something to do with data filtering.

Anybody an idea?

[Greg_Deckler]

OK, I ran this through and created a quick model. I don't see the issue that you are seeing.

Mine is setup like so:

Shared series: Month

Column series: Age

Column values: Active Users

Line values: Active Users

Visual level filters:

Active Users (All)

Age (All)

Month (All)

Active Users is setup just like yours and I have a User Activity table (Table1) and a Users table linked by a Users 1->*User Activity cross filtered Both relationship

I would double check that your column values and line values are both set to the same thing because the only way that I could think that they could be different is, well, if they were different.

[greggyb]

I noticed you created a relationship based on a timestamp. Does the fact table include a time portion, or are all dates set to midnight?

Same question for your date dimension.

Data Format can change what is displayed, so you may only see the date portion.

Create a calculated column in your fact table:

DateContainsTime =
FactTable[Timestamp] 
    <> DATE(
          YEAR( FactTable[Timestamp] )
          ,MONTH( FactTable[Timestamp] )
          ,DAY( FactTable[Timestamp] )
       )

If that's true anywhere, you need to truncate off the time portion of the timestamp and use a separate time dimension.