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hi all, i have a table in power bi desktop as in the following, i need to calculate the daily changes for each item starting from the minimum value whcih is already on the first date,new dates are added every day with new values (accumulated)
Name | Date | Cumulative Value |
item1 | date1 | 1 |
item2 | date1 | 6 |
item3 | date1 | 9 |
item1 | date2 | 6 |
item2 | date2 | 12 |
item3 | date2 | 16 |
item1 | date3 | 11 |
item2 | date3 | 26 |
item3 | date3 | 28 |
Solved! Go to Solution.
Hi @Anonymous ,
You can try this query:
let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WyixJzTVU0lEyMjAy1DfRBzENlWJ1IBJGqBJmcAljVAlLuASSUUYoOoxQJQyNsJkFljHDZhhIkSFWh4G1Y3UZmGmhFBsLAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Name = _t, Date = _t, #"Cumulative Value" = _t]),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Name", type text}, {"Date", type date}, {"Cumulative Value", Int64.Type}}),
#"Grouped Rows" = Table.Group(#"Changed Type", {"Name"}, {{"Data", each let tab=Table.AddIndexColumn(_,"Index",1,1,Int64.Type) in Table.AddColumn(tab,"New",(x)=>try Table.Max( Table.SelectRows(tab,(y)=>y[Index]=x[Index]-1),"Index")[Cumulative Value] otherwise (x)[Cumulative Value] ), type table [Name=nullable text, Date=nullable date]}}),
#"Added Custom" = Table.AddColumn(#"Grouped Rows", "New Data", each Table.AddColumn([Data],"Diff", each [Cumulative Value] - [New])),
#"Removed Columns" = Table.RemoveColumns(#"Added Custom",{"Data"}),
#"Expanded New Data" = Table.ExpandTableColumn(#"Removed Columns", "New Data", {"Date", "Cumulative Value", "Diff"}, {"New Data.Date", "New Data.Cumulative Value", "New Data.Diff"}),
#"Sorted Rows" = Table.Sort(#"Expanded New Data",{{"New Data.Date", Order.Ascending}, {"Name", Order.Ascending}}),
#"Renamed Columns" = Table.RenameColumns(#"Sorted Rows",{{"New Data.Date", "Date"}, {"New Data.Cumulative Value", "Cumulative Value"}, {"New Data.Diff", "Diff"}}),
#"Changed Type1" = Table.TransformColumnTypes(#"Renamed Columns",{{"Date", type date}, {"Cumulative Value", Int64.Type}, {"Diff", Int64.Type}})
in
#"Changed Type1"
Best Regards,
Community Support Team _ Yingjie Li
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Hi @Anonymous ,
You can try this query:
let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WyixJzTVU0lEyMjAy1DfRBzENlWJ1IBJGqBJmcAljVAlLuASSUUYoOoxQJQyNsJkFljHDZhhIkSFWh4G1Y3UZmGmhFBsLAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Name = _t, Date = _t, #"Cumulative Value" = _t]),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Name", type text}, {"Date", type date}, {"Cumulative Value", Int64.Type}}),
#"Grouped Rows" = Table.Group(#"Changed Type", {"Name"}, {{"Data", each let tab=Table.AddIndexColumn(_,"Index",1,1,Int64.Type) in Table.AddColumn(tab,"New",(x)=>try Table.Max( Table.SelectRows(tab,(y)=>y[Index]=x[Index]-1),"Index")[Cumulative Value] otherwise (x)[Cumulative Value] ), type table [Name=nullable text, Date=nullable date]}}),
#"Added Custom" = Table.AddColumn(#"Grouped Rows", "New Data", each Table.AddColumn([Data],"Diff", each [Cumulative Value] - [New])),
#"Removed Columns" = Table.RemoveColumns(#"Added Custom",{"Data"}),
#"Expanded New Data" = Table.ExpandTableColumn(#"Removed Columns", "New Data", {"Date", "Cumulative Value", "Diff"}, {"New Data.Date", "New Data.Cumulative Value", "New Data.Diff"}),
#"Sorted Rows" = Table.Sort(#"Expanded New Data",{{"New Data.Date", Order.Ascending}, {"Name", Order.Ascending}}),
#"Renamed Columns" = Table.RenameColumns(#"Sorted Rows",{{"New Data.Date", "Date"}, {"New Data.Cumulative Value", "Cumulative Value"}, {"New Data.Diff", "Diff"}}),
#"Changed Type1" = Table.TransformColumnTypes(#"Renamed Columns",{{"Date", type date}, {"Cumulative Value", Int64.Type}, {"Diff", Int64.Type}})
in
#"Changed Type1"
Best Regards,
Community Support Team _ Yingjie Li
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
You can use the following formula, just replace MyTable with the name of the previous step:
= Table.FromColumns(Table.ToColumns(MyTable) & {List.Accumulate(MyTable[Cumulative Value], [List = {}, Prev = 0], (current, next) => [List = current[List] & {next - current[Prev]}, Prev = next - current[Prev]])[List]}, Table.ColumnNames(MyTable) & {"DoD"})
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