Forum Discussion

anwargabr's avatar
anwargabr
Helper I
4 years ago
Solved

Interest Calculation

Dear Experts,   I need your help and ideas, I have the below data and wante to allocate the monthly interst to each mont, Is ther any ideas?   Thanks    Loan Number Amount Rate From to ...
  • tamerj1's avatar
    tamerj1
    4 years ago

    Hi anwargabr ,
    Actually I changed my mind. It seems "at least to me" that it is easier to unpivot the data using dax. I explained earlier how to create a simple date table in DAX. Now all you need to do is to create a new table by CROSSJOIN both Date and Loans tables to generate all combinations then filter down only to the relivant ones as per below code.

    FullData = 
VAR FullDateData =
    CROSSJOIN (
        'Date',
        Loans
    )
VAR ExistingDateData =
    FILTER ( 
        FullDateData,
        [Date] > [From]
            && [Date] <= [to]
    )
RETURN
    ExistingDateData

    This is how the original data looks like 

    an this the how the unpivoted data looks like

    Next you create the relationship between Date and FullData tables.

    Last you need to create your measure

    Interest Amount = 
SUMX ( 
    FullData,
    DIVIDE ( FullData[Amount] * FullData[Rate], 360, 0)
)

    The results 100% matchews the calculations in your excel sheet.

    Here is the link to download the Pbi file https://www.dropbox.com/t/axD7brB2Czc8br8V

  • tamerj1's avatar
    tamerj1
    3 years ago

    Hi anwargabr 
    Sorry for the very late reply.

    Please refer to attached file for two options: 

    • Adjusting the calculated table as follows

    • Creating a measure directly without creating a calculated table.

    Option

tamerj1's avatar
tamerj1
Community Champion
4 years ago

Hi anwargabr ,
First you need to create a table that contains all the dates included in order to calculate the interest per each date. Let's call it "PerDate" table. You can use the following simple code:

 

PerDate = 
    CALENDAR ( 
        Min ( Loans[From] ),
        Max ( Loans[to] )
    ) ​

 

In this table create a new month calculated cloumn:

 

Month = FORMAT ( DATE ( 1, MONTH ( PerDate[Date] ), 1 ) , "mmm" )

 

Then add another calculated column to calculate the average daily interest as follows:

 

Interest = 
VAR CurrentDate = 'PerDate'[Date]
VAR CrrentLoans =
    FILTER (
        Loans,
        Loans[From] <= CurrentDate &&
            Loans[to] > CurrentDate
    )
VAR Result =
    CALCULATE ( 
        SUMX (
            CrrentLoans,
            DIVIDE ( Loans[Interest], Loans[Days] )
        )
    )
RETURN
Result

 

Basically, this code filters the loans table to include only the rows that include each date. Then it iterates over the filtered table to calculate the average interst per each day.

Now you can simply create your measure:

 

Ineterst ($) = SUM ( PerDate[Interest] )

 

Then create your report agregated by Month:

anwargabr's avatar
anwargabr
Helper I
4 years ago

tamerj1 Thanks and much apperciate dear Tamer, I will try it and let you know.