XBITXOR 09-20-2023 11:12 AM - last edited 09-26-2023 12:50 PM

[Greg_Deckler]

It's BITXOR but for multiple rows.

XBITXOR = 
    VAR __RowCount = COUNTROWS('bitor')
    VAR __Length = LEN(MAX('bitor'[day_of_month_bit_position]))
    VAR __String = CONCATENATEX('bitor', [day_of_month_bit_position])
    VAR __Table = 
            ADDCOLUMNS(
                GENERATESERIES(0, __RowCount * __Length - 1),
                "__Bit", MID(__String, [Value]+1, 1) + 0,
                "__Mod", MOD([Value], __Length)
            )
    VAR __Table1 = 
        ADDCOLUMNS(
            GENERATESERIES(0, __Length - 1),
            "__BITXOR", 
                    VAR __Index = [Value]
                    VAR __Sum = SUMX(FILTER(__Table, [__Mod] = __Index),[__Bit])
                    VAR __Result = IF(__Sum = 1, 1, 0)
                RETURN
                    __Result
        )
RETURN
    CONCATENATEX(__Table1, [__BITXOR],,[Value],ASC)

eyJrIjoiYjI5NTljYTYtZDlmMi00MmNjLWFiOWYtMmE0Nzc2ZGUyODQ1IiwidCI6IjRhMDQyNzQzLTM3M2EtNDNkMi04MjdiLTAwM2Y0YzdiYTFlNSIsImMiOjN9

[AlexisOlson]

@Greg_Deckler I think you're a bit off somewhere. For example, shouldn't customer_3, month 1 have 1 as the last digit?

Here's my attempt:

XBITOR = 
VAR _BitStrings_ = DISTINCT ( 'bitor'[day_of_month_bit_position] )
VAR _Length = MAXX ( _BitStrings_, LEN ( 'bitor'[day_of_month_bit_position] ) )
VAR _BITOR_ =
    ADDCOLUMNS (
        GENERATESERIES ( 1, _Length ),
        "@Bit",
            MAXX (
                _BitStrings_,
                MID ( 'bitor'[day_of_month_bit_position], [Value], 1 )
            )
    )
VAR _ToString = CONCATENATEX ( _BITOR_, [@Bit], "", [Value] )
RETURN
    _ToString

[Greg_Deckler]

 Yeah, there was an original logic error in XBITOR that I fixed on XBITOR and XBITAND but hadn't gotten around to XBITXOR yet. It's a really simple fix that involves the following two lines of code (both GENERATESERIES). I updated everything.

 GENERATESERIES(0, __RowCount * __Length - 1)

and

GENERATESERIES(0, __Length - 1),

@AlexisOlson

[AlexisOlson]

Nice.

I just realized that I posted my XBITOR in the XBITXOR thread.

For XBITXOR, you do need to use the sum logic like you have instead of a simple MAXX for XBITOR and MINX for XBITAND:

XBITXOR = 
VAR _BitStrings_ =
    SELECTCOLUMNS (
        DISTINCT ( 'bitor'[Pos] ),
        "@BitStr", 'bitor'[Pos]
    )
VAR _Length = MAXX ( ALLSELECTED ( 'bitor' ), LEN ( 'bitor'[Pos] ) )
VAR _Padded_ =
    ADDCOLUMNS (
        _BitStrings_,
        "@Padded", REPT ( "0", _Length - LEN ( [@BitStr] ) ) & [@BitStr]
    )
VAR _BITOR_ =
    ADDCOLUMNS (
        GENERATESERIES ( 1, _Length ),
        "@Bit",
            VAR _Sum = SUMX ( _Padded_, INT ( MID ( [@Padded], [Value], 1 ) ) )
            VAR _Result = IF ( _Sum = 1, "1", "0" )
            RETURN
                _Result
    )
VAR _ToString = CONCATENATEX ( _BITOR_, [@Bit], "", [Value] )
RETURN
    _ToString

[AlexisOlson]

If the bit strings are not all the same length, then you probably want to left pad with zeros like this:

XBITOR = 
VAR _BitStrings_ =
    SELECTCOLUMNS (
        DISTINCT ( 'bitor'[Pos] ),
        "@BitStr", 'bitor'[Pos]
    )
VAR _Length = MAXX ( ALLSELECTED ( 'bitor' ), LEN ( 'bitor'[Pos] ) )
VAR _Padded_ =
    ADDCOLUMNS (
        _BitStrings_,
        "@Padded", REPT ( "0", _Length - LEN ( [@BitStr] ) ) & [@BitStr]
    )
VAR _BITOR_ =
    ADDCOLUMNS (
        GENERATESERIES ( 1, _Length ),
        "@Bit", MAXX ( _Padded_, MID ( [@Padded], [Value], 1 ) )
    )
VAR _ToString = CONCATENATEX ( _BITOR_, [@Bit], "", [Value] )
RETURN
    _ToString

[Greg_Deckler]

@AlexisOlson I like the idea of padding for instances of having different lengths of bits.