Forum Discussion
Add a unique identifier column to blocks with repeating values
Hey All.
I have time series data of the following structure.
The "Stage" values are repeating across the table for different periods of time.
| seconds | Stage |
| 1 | A |
| 2 | A |
| 3 | B |
| 4 | B |
| 5 | B |
| 6 | B |
| 7 | C |
| 8 | C |
| 9 | A |
I would like to add a "Stage_ID" column which identifies each stage period uniquelly.
| seconds | Stage | Stage_ID |
| 1 | A | 111 |
| 2 | A | 111 |
| 3 | B | 222 |
| 4 | B | 222 |
| 5 | B | 222 |
| 6 | B | 222 |
| 7 | C | 333 |
| 8 | C | 333 |
| 9 | A | 444 |
Is there a way to achieve this with Power Query / DAX?
Hello melmell
here a similar approach like CNENFRNL , but stage period numbered starting from 1, 2 etc.
let Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUXJUitWJVjKCs4yBLCcwywTOMoWzzOAscyDLGcyygLMsIabEAgA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [seconds = _t, Stage = _t]), GroupLocal = Table.Group ( Source, "Stage", {{"allrows", each _}}, GroupKind.Local ), AddIndex = Table.AddIndexColumn(GroupLocal, "Index", 1, 1), ExpandTable = Table.ExpandTableColumn(AddIndex, "allrows", {"seconds"}, {"seconds"}) in ExpandTableCopy paste this code to the advanced editor in a new blank query to see how the solution works.
If this post helps or solves your problem, please mark it as solution (to help other users find useful content and to acknowledge the work of users that helped you)
Kudoes are nice too
Have fun
Jimmy
6 Replies
Hello melmell
here a similar approach like CNENFRNL , but stage period numbered starting from 1, 2 etc.
let Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUXJUitWJVjKCs4yBLCcwywTOMoWzzOAscyDLGcyygLMsIabEAgA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [seconds = _t, Stage = _t]), GroupLocal = Table.Group ( Source, "Stage", {{"allrows", each _}}, GroupKind.Local ), AddIndex = Table.AddIndexColumn(GroupLocal, "Index", 1, 1), ExpandTable = Table.ExpandTableColumn(AddIndex, "allrows", {"seconds"}, {"seconds"}) in ExpandTableCopy paste this code to the advanced editor in a new blank query to see how the solution works.
If this post helps or solves your problem, please mark it as solution (to help other users find useful content and to acknowledge the work of users that helped you)
Kudoes are nice too
Have fun
JimmyHi, melmell
Based on your description, I created data to reproduce your scenario. The pbix file is attached in the end.
Table:
You may create a calculated column as below.
Column = var tab = ADDCOLUMNS( 'Table', "Flag", var laststage = LOOKUPVALUE('Table'[Stage],'Table'[Seconds],[Seconds]-1,Blank()) return IF( ISBLANK(laststage)||laststage<>[Stage], 1,0 ) ) var newtab = ADDCOLUMNS( tab, "Result", var val = SUMX( FILTER( tab, [Seconds]<=EARLIER('Table'[Seconds]) ), [Flag] ) return val*100+val*10+val ) return SUMX( FILTER( newtab, [Seconds]=EARLIER('Table'[Seconds])&& [Stage]=EARLIER('Table'[Stage]) ), [Result] )Result:
Best Regards
Allan
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Hi, melmell , you may want to try this pattern
let Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUXJUitWJVjKCs4yBLCcwywTOMoWzzOAscyDLGcyygLMsIabEAgA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [seconds = _t, Stage = _t]), bins = Table.Group(Source, {"Stage"}, {{"bin", each List.Min([seconds])}}, GroupKind.Local)[bin], #"Added Custom" = Table.AddColumn(Source, "Stage_ID", each [pos = List.PositionOf(bins, [seconds]), result = if pos=-1 then null else Text.Repeat(Text.From(pos+1),3)][result]), #"Filled Down" = Table.FillDown(#"Added Custom",{"Stage_ID"}) in #"Filled Down"
