Dax 基于 2 列生成系列

Question

I am trying to analyse energy consumption using rolling 365 day values and using assumptions and averages to get daily usage, the more reads the more accurate the assumptions become. I have the data set calculated but now its putting it into a analysable table.

Dataset

MPAN	Current_Supplier	EAC	EAC_EFD	Days Applicable	0
ID1	TGPL	96.7	22/05/2021	365	0.26
ID1	TGPL	28009.9	26/11/2021	188	148.74
ID1	TGPL	30771.2	23/05/2022	178	16.61
ID2	TGPL	191.9	22/05/2021	365	0.53
ID2	TGPL	217.9	26/08/2021	96	0.8
ID2	TGPL	118.1	26/11/2021	92	-0.56
ID2	TGPL	38	25/02/2022	91	-0.35
ID2	TGPL	18.2	23/05/2022	87	0.3

Column "0" is Daily usage

So I have loaded it into Power BI as is and i want to generate a second table where I have column 1 showing the "MPAN" repeating as many times as the "Days Applicable" and column 2 showing the "EAC_EFD" (in a generate series with an increment of 1) and finally a "0" column (AKA daily usage) which will repeat like the MPAN as exampled below in an excel example with notes.

I've only been using BI for 2 month now so I'm fairly amateur at the whole thing so if there's a different or more efficient way of doing this let me know. Organising it in Python/PHP or a different Code/format is something I could be also interested in doing before I dump it to BI (assuming what I want to do cant be done) so its a wide open one.

Thanks Ethan

Answer 1

Simply add a column that is a list of all numbers <= [Days Applicable] then "Expand to new rows" on the list, like this:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45W8nQxVNJRsjTTMwdSxmamQFLPyEwpVgcmZWRhYGCpZwlkGVpYgEgTCz1zE6XYWAA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [MPAN = _t, EAC = _t, #"Days Applicable" = _t, Usage = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"MPAN", type text}, {"EAC", type number}, {"Days Applicable", Int64.Type}, {"Usage", type number}}),
    #"Added Custom" = Table.AddColumn(#"Changed Type", "Day", each {1..[Days Applicable]}),
    #"Expanded Days" = Table.ExpandListColumn(#"Added Custom", "Day")
in
    #"Expanded Days"