How LastNonBlank with multiple asset IDs

[Chimsie]

Hi everyone 

I have a table which collected data from a realtime sources, sometimes it happens that the collections fails for some reason on some assets, now I am trying to populate these missing values with the most recent value (LASTNONBLANK) at that point in time.

For example: 

Table1 

     Date          AssetID    Value  Calculated column 

10/09/2020    11202       3.42              3.42 

10/09/2020    14210       6.50              6.50 

10/09/2020    19500       2.21              2.21 

10/09/2020    21200       7.25              7.25 

11/09/2020    11202       3.66              3.66 

11/09/2020    14210       null               6.50 

11/09/2020    19500       null               2.21 

11/09/2020    21200       7.95              7.95 

12/09/2020    11202       null               3.66 

12/09/2020    14210       7.12              7.12 

12/09/2020    19500       null               2.21 

12/09/2020    21200       null               7.25 

13/09/2020    14210       6.91               etc. 

13/09/2020    19500       2.01 

13/09/2020    21200       null 

13/09/2020    11202       3.10 

An Assets ID tries to poll data every day, if this fails, null is written in the column value for this asset. 

With the help of the this forum I was able the fill the blanks for a unique Asset ID with below DAX formular

=LOOKUPVALUE(Table1[Value],Table1[AssetID],Table1[AssetID],Table1[Date], 

CALCULATE(LASTNONBLANK(Table1 [Date], 1), 

FILTER(Table1,Table1[Value]>0 &&EARLIER(Table1 [Date])>= Table1 [Date]))) 

But this DAX formular does not work with multiple asset IDs 

Can some one help? 

[amitchandak]

@Chimsie , Try a new column like

if(isblank(Table[Value]),
CALCULATE(LASTNONBLANKvalue(Table1 [Date], max(Table[Value])), FILTER(Table1, Table1[AssetID]= EARLIER(Table1[AssetID]) && Table1 [Date] < EARLIER(Table1 [Date])))
,Table[Value] )

[Chimsie]

@amitchandak 

This returns A circular dependency was detected: Table[Result]

Any idea?

[richbenmintz · Accepted solution]

Hi @Chimsie,

Please try the following calculated column

calc value = 
    var assetid = [AssetID]
    var curDate = [Date]
    var priorMaxDate = CALCULATE(MAX('Table1'[Date]), FILTER('Table1', 'Table1'[AssetID] = assetid && [Date] < curDate && 'Table1'[Value] <> BLANK()))
return 
   if([Value] = blank(), CALCULATE(max('Table1'[Value]), FILTER('Table1', [AssetID] = assetid && [Date] = priorMaxDate)), 'Table1'[Value])

Hope this Helps,
Richard
Did I answer your question? Mark my post as a solution!
Did my answers help arrive at a solution? Give it a kudos by clicking the Thumbs Up!

[Chimsie]

@richbenmintz 

An additional question, is it possible to expand the formula with the following,

When it fails to collect data from a source (assetID) for 3 consecutive days, the calculated column will change to zero for that assetID. this does not have to be retroactive.

[Chimsie]

Thank you, this works perfect:-)