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## Replicating excel formula | precedent referencing

Hello community,

Need help in replicating the following formula in DAX or in power query -

In Excel we can easily use precedent referencing but in dax or power query I haven't found anything, i need ut for below use, in first screenshot it's the evaluated values, and in second, formulas behind those, i just need a way i can do the same in power bi at the end,

note that first values are manually entered '0'  copy paste the values from below to test out

 Total engine hours Pulse 0 0 0.8 0.8 1.65 1.65 0.3 1.65 0.3 1.65 6.1 7.45 1.15 7.45
1 ACCEPTED SOLUTION  Memorable Member
``````let
Source = your_source_table,
data = List.Buffer(Source[Total engine hours]),
max_count = List.Count(data),
pulse =
List.Generate(
() => [i = 0, p = 0],
(x) => x[i] < max_count,
(x) => [i = x[i] + 1, p = if (data{i} >= data{x[i]}) then x[p] + data{i} - data{x[i]} else x[p]],
(x) => x[p]
),
out = Table.FromColumns(Table.ToColumns(Source) & {pulse}, Table.ColumnNames(Source) & {"Pulse"})
in
out``````
6 REPLIES 6  Memorable Member
``````let
Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
data = List.Buffer(Source[Total engine hours]),
max_count = List.Count(data),
pulse =
List.Generate(
() => [i = 0, p = 0],
(x) => x[i] < max_count,
(x) => [i = x[i] + 1, p = if (data{i} >= data{x[i]}) then x[p] + data{i} - data{x[i]} else x[p]],
(x) => x[p]
),
out = Table.FromColumns({data, pulse}, {"Total engine hours", "Pulse"})
in
out`````` Frequent Visitor

@AlienSx, this sort of solves my issue, but my actual data comes from sql database which has this 'Total engine hours' with multiple other columns, which of the bits i would need to edit then?  Memorable Member
``````let
Source = your_source_table,
data = List.Buffer(Source[Total engine hours]),
max_count = List.Count(data),
pulse =
List.Generate(
() => [i = 0, p = 0],
(x) => x[i] < max_count,
(x) => [i = x[i] + 1, p = if (data{i} >= data{x[i]}) then x[p] + data{i} - data{x[i]} else x[p]],
(x) => x[p]
),
out = Table.FromColumns(Table.ToColumns(Source) & {pulse}, Table.ColumnNames(Source) & {"Pulse"})
in
out`````` Frequent Visitor

I believe this will definitely help, thank you so much!

Do you know if there's a way we can achieve the same through DAX?  Memorable Member

DAX - most likely yes but I am not a DAX guy (yet) 😎 Frequent Visitor

Pretty sure you will reach there very soon, really appreciate your help!   