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Hi
I'm trying to work out how to achieve the following in DAX (or Power Query) that I currently do using VBA in excel.
I have a table with data similar to the below:
Distance From | Distance To | Type |
0 | 1 | Red |
1 | 2 | Red |
2 | 4 | Green |
4 | 10 | Green |
10 | 13 | Green |
13 | 14 | Red |
14 | 33 | Red |
33 | 40 | Blue |
40 | 45 | Green |
45 | 46 | Green |
46 | 50 | Red |
And need to rationalise it to the below.
Distance From | Distance To | Type |
0 | 2 | Red |
2 | 13 | Green |
13 | 33 | Red |
33 | 40 | Blue |
40 | 46 | Green |
46 | 50 | Red |
So currently I do this in VBA by looping through the rows and keeping track of the Min [Distance From] from and Max [Distance To] until the [Type] changes. The data is alway sorted on [Distance From] ascending and the [Distance To] always matches the next rows [Distance From]
Solved! Go to Solution.
let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlDSUTIE4qDUFKVYnWgw2wiJD2KbALF7UWpqHlgExDM0QBECcw2NUcVAXEMTZKNBHGNjJBEwxwSk2SmnNBViOohnYopqI4hrYoYqBuKaGsAMiwUA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Distance From" = _t, #"Distance To" = _t, Type = _t]),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Distance From", Int64.Type}, {"Distance To", Int64.Type}}),
#"Grouped Rows" = Table.Group(#"Changed Type", {"Type"}, {{"Distance From", each List.Min([Distance From]), type nullable number}, {"Distance To", each List.Max([Distance To]), type nullable number}},GroupKind.Local)
in
#"Grouped Rows"
obligatory credit: @ImkeF
let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlDSUTIE4qDUFKVYnWgw2wiJD2KbALF7UWpqHlgExDM0QBECcw2NUcVAXEMTZKNBHGNjJBEwxwSk2SmnNBViOohnYopqI4hrYoYqBuKaGsAMiwUA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Distance From" = _t, #"Distance To" = _t, Type = _t]),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Distance From", Int64.Type}, {"Distance To", Int64.Type}}),
#"Grouped Rows" = Table.Group(#"Changed Type", {"Type"}, {{"Distance From", each List.Min([Distance From]), type nullable number}, {"Distance To", each List.Max([Distance To]), type nullable number}},GroupKind.Local)
in
#"Grouped Rows"
obligatory credit: @ImkeF
I always discounted using group. I guess I missed reading up on the GroupKind parameter.
Thanks that worked a treat.
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