Find a value associated with the latest date

[cmccully]

I have a list of mileage reads and want to get the reading associated with the latest mileage date. 

Because mileages are sometimes corrected I cannot simply grab the highest mileage reading because that value may not be accurate. For example, in the screen shot below we see the correct mileage for this vehicle is 106598 taken on 8/20. However, the highest reading is 140357 taken on 8/9.

What I want is a measure to give the different of the earliest and latest readings. Something like this but that does not use the max of meter but that uses the meter reading associted with the latest date Query1[METER_DATE].

Usage Measure = MAX(Query1[METER]) - MIN(Query1[METER])

Thank you for any help you can provide.

[Ashish_Mathur]

Hi,

Share the link from where i can download your PBI file.

[cmccully]

Sorry for the delay in responding. I have posted a test file here:

https://drive.google.com/file/d/14Vq9JOr5tWuilC4Z-rbM6BSnulIzJ8LU/view?usp=sharing

[Anonymous]

@cmccully

Did you attempt with what I recommend Ed in my last post as that worked?

[Anonymous]

Hey @cmccully 

You can use calculate to:

1. Get the MAX reading

2. For the MAX date

Maybe something like this:

CALCULATE(
     MAX(Query1[METER]) - MIN(Query1[METER]),
     Query1[METER_DATE] = MAX(Query1[METER_DATE])
)

[cmccully]

I get this error when using your formula in a measure:

A function 'MAX' has been used in a True/False expression that is used as a table filter expression. This is not allowed.

[Anonymous]

Hey @cmccully 

I saw your response last night when I got home from work. My apologies.

I should have formatted the filter argument of Calculate differently:

Latest Date Max_Min = 
CALCULATE(
    MAX(Query1[Meter]) - MIN(Query1[Meter]),
    FILTER(
        Query1,
        Query1[Meter_Date] = MAX(Query1[Meter_Date])
    )
)

Here is a screenshot of my test:

Click HERE to access my pbix file used for testing.

[cmccully]

Sorry for taking so long to respond. I created a measure using your new DAX code but am still not getting anything. I posted a link below to the PBIX test file I am using.

Here is what it looks like when I try to use the measure:

I want to get the mileage 106878 as that is the reading associated with the latest date.

Thank you!

https://drive.google.com/file/d/14Vq9JOr5tWuilC4Z-rbM6BSnulIzJ8LU/view?usp=sharing

[Ashish_Mathur · Accepted solution]

Hi,

This measure works

Measure = CALCULATE(SUM('Sheet 1'[METER]),LASTDATE('Sheet 1'[METER_DATE]))

Hope this helps.

[ricardokazuo]

Hello there, nice, it worked on my side as well. One question... why can't I substitute the lastdate() with min() or max()?

[Ashish_Mathur]

You are welcome.  The LASTDATE() function returns a table of 1 row and 1 column whereas the MAX() function returns a single scalar value.

[cmccully]

Thank you, that worked!

[Ashish_Mathur]

You are welcome.