LIne chart date axis error

[Anonymous]

Not sure why but my line chart below (after auto refresh today) has suddenly split/duplicated the dates twice for the week ending 06/12/2020. The date axis is linked to calendar table created in power query. Any reason why its doing this? Appreciate any help thanks.

let fnDateTable = (StartDate as date, EndDate as date, optional FYStartMonth as number, optional Holidays as list, optional WDStartNum as number ) as table =>
  let
    FYStartMonth = if List.Contains( {1..12}, FYStartMonth ) then FYStartMonth else 1,
    //the WDStartNum parameter allows you to set Weekday numbering running from 0-6 or 1-7 but first day of the week will remain Monday
    WDStart = if List.Contains( {0, 1}, WDStartNum ) then WDStartNum else 0,
    CurrentDate = Date.From(DateTime.FixedLocalNow()),
    DayCount = Duration.Days(Duration.From(EndDate - StartDate))+1,
    Source = List.Dates(StartDate,DayCount,#duration(1,0,0,0)),
    AddToday = if EndDate < CurrentDate then List.Combine( {Source, {CurrentDate}}) else Source,
    TableFromList = Table.FromList(AddToday, Splitter.SplitByNothing()),
    ChangedType = Table.TransformColumnTypes(TableFromList,{{"Column1", type date}}),
    RenamedColumns = Table.RenameColumns(ChangedType,{{"Column1", "Date"}}),
    InsertYear = Table.AddColumn(RenamedColumns, "Year", each Date.Year([Date]), type number),
    InsertQuarter = Table.AddColumn(InsertYear, "QuarterOfYear", each Date.QuarterOfYear([Date]), type number),
    InsertMonth = Table.AddColumn(InsertQuarter, "MonthOfYear", each Date.Month([Date]), type number),
    InsertDay = Table.AddColumn(InsertMonth, "DayOfMonth", each Date.Day([Date]), type number),
    InsertDayInt = Table.AddColumn(InsertDay, "DateInt", each [Year] * 10000 + [MonthOfYear] * 100 + [DayOfMonth], type number),
    InsertMonthName = Table.AddColumn(InsertDayInt, "Month Name", each Date.ToText([Date], "MMMM"), type text),
    InsertCalendarMonth = Table.AddColumn(InsertMonthName, "Month & Year", each (try(Text.Range([Month Name],0,3)) otherwise [Month Name]) & " " & Number.ToText([Year]), type text),
    InsertCalendarQtr = Table.AddColumn(InsertCalendarMonth, "Quarter & Year", each "Q" & Number.ToText([QuarterOfYear]) & " " & Number.ToText([Year]), type text),
    InsertDayWeek = Table.AddColumn(InsertCalendarQtr, "DayOfWeek", each Date.DayOfWeek([Date]) + WDStart, Int64.Type),
    InsertDayName = Table.AddColumn(InsertDayWeek, "DayOfWeekName", each Date.ToText([Date], "dddd"), type text),
    InsertWeekEnding = Table.AddColumn(InsertDayName, "WeekEnding", each Date.EndOfWeek( [Date], Day.Monday), type date),
    InsertMonthEnding = Table.AddColumn(InsertWeekEnding, "MonthEnding", each Date.EndOfMonth([Date]), type date),
    InsertWeekNumber= Table.AddColumn(InsertMonthEnding, "ISO Weeknumber", each
      if Number.RoundDown((Date.DayOfYear([Date])-(Date.DayOfWeek([Date], Day.Monday)+1)+10)/7)=0
      then Number.RoundDown((Date.DayOfYear(#date(Date.Year([Date])-1,12,31))-(Date.DayOfWeek(#date(Date.Year([Date])-1,12,31), Day.Monday)+1)+10)/7)
      else if (Number.RoundDown((Date.DayOfYear([Date])-(Date.DayOfWeek([Date], Day.Monday)+1)+10)/7)=53 and (Date.DayOfWeek(#date(Date.Year([Date]),12,31), Day.Monday)+1<4))
      then 1 else Number.RoundDown((Date.DayOfYear([Date])-(Date.DayOfWeek([Date], Day.Monday)+1)+10)/7), type number),
    InsertISOyear = Table.AddColumn(InsertWeekNumber, "ISO Year", each Date.Year( Date.AddDays( Date.StartOfWeek([Date], Day.Monday), 3 )),  Int64.Type),
    BufferTable = Table.Buffer(Table.Distinct( InsertISOyear[[ISO Year], [DateInt]])),
    InsertISOday = Table.AddColumn(InsertISOyear, "ISO Day of Year", (OT) => Table.RowCount( Table.SelectRows( BufferTable, (IT) => IT[DateInt] <= OT[DateInt] and IT[ISO Year] = OT[ISO Year])),  Int64.Type),
    InsertCalendarWk = Table.AddColumn(InsertISOday, "Week & Year", each Text.From([ISO Year]) & "-" & Text.PadStart( Text.From( [ISO Weeknumber] ), 2, "0"), type text ),
    InsertWeeknYear = Table.AddColumn(InsertCalendarWk, "WeeknYear", each [ISO Year] * 10000 + [ISO Weeknumber] * 100,  Int64.Type),

    InsertMonthnYear = Table.AddColumn(InsertWeeknYear , "MonthnYear", each [Year] * 10000 + [MonthOfYear] * 100, type number),
    InsertQuarternYear = Table.AddColumn(InsertMonthnYear, "QuarternYear", each [Year] * 10000 + [QuarterOfYear] * 100, type number),
    AddFY = Table.AddColumn(InsertQuarternYear, "Fiscal Year", each "FY" & (if [MonthOfYear] >= FYStartMonth then Text.PadEnd( Text.End( Text.From([Year] +1), 2), 2, "0") else Text.End( Text.From([Year]), 2)), type text),
    AddFQ = Table.AddColumn(AddFY, "Fiscal Quarter", each "FQ" & Text.From( Number.RoundUp( Date.Month( Date.AddMonths( [Date], - (FYStartMonth -1) )) / 3 )), type text),
    AddFM = Table.AddColumn(AddFQ, "Fiscal Period", each if [MonthOfYear] >= FYStartMonth then [MonthOfYear] - (FYStartMonth-1) else [MonthOfYear] + (12-FYStartMonth+1), type text),

    InsertIsAfterToday = Table.AddColumn(AddFM, "IsAfterToday", each not ([Date] <= Date.From(CurrentDate)), type logical),
    InsertIsWorkingDay = Table.AddColumn(InsertIsAfterToday, "IsWorkingDay", each if Date.DayOfWeek([Date], Day.Monday) > 4 then false else true, type logical),
    InsertIsHoliday = Table.AddColumn(InsertIsWorkingDay, "IsHoliday", each if Holidays = null then "Unknown" else List.Contains( Holidays, [Date] ), if Holidays = null then type text else type logical),
    InsertIsBusinessDay = Table.AddColumn(InsertIsHoliday, "IsBusinessDay", each if [IsWorkingDay] = true and [IsHoliday] <> true then true else false, type logical),
    InsertDayType = Table.AddColumn(InsertIsBusinessDay, "Day Type", each if [IsHoliday] = true then "Holiday" else if [IsWorkingDay] = false then "Weekend" else if [IsWorkingDay] = true then "Weekday" else null, type text),

    //InsertDayOffset = Table.AddColumn(InsertDayType, "DayOffset", each Number.From([Date] - CurrentDate), type number),  //if you enable DayOffset, don't forget to adjust the PreviousStepName in the next line of code.
    InsertWeekOffset = Table.AddColumn(InsertDayType, "WeekOffset", each (Number.From(Date.StartOfWeek([Date], Day.Monday))-Number.From(Date.StartOfWeek(CurrentDate, Day.Monday)))/7, type number),
    InsertMonthOffset = Table.AddColumn(InsertWeekOffset, "MonthOffset", each ((12 * Date.Year([Date])) +  Date.Month([Date])) - ((12 * Date.Year(Date.From(CurrentDate))) +  Date.Month(Date.From(CurrentDate))), type number),
    InsertQuarterOffset = Table.AddColumn(InsertMonthOffset, "QuarterOffset", each ((4 * Date.Year([Date])) +  Date.QuarterOfYear([Date])) - ((4 * Date.Year(Date.From(CurrentDate))) +  Date.QuarterOfYear(Date.From(CurrentDate))), type number),
    InsertYearOffset = Table.AddColumn(InsertQuarterOffset, "YearOffset", each Date.Year([Date]) - Date.Year(Date.From(CurrentDate)), type number),

    IdentifyCurrentDate = Table.SelectRows(InsertYearOffset, each ([Date] = CurrentDate)),
    CurrentYear = IdentifyCurrentDate{0}[Year],
    CurrentMonth = IdentifyCurrentDate{0}[MonthOfYear],
    InsertFYoffset = Table.AddColumn(InsertYearOffset, "FiscalYearOffset", each try (if [MonthOfYear] >= FYStartMonth then [Year]+1 else [Year]) - 
      (if CurrentMonth >= FYStartMonth then CurrentYear+1 else CurrentYear) otherwise null, type number),
    RemoveToday = if EndDate < CurrentDate then Table.SelectRows(InsertFYoffset, each ([Date] <> CurrentDate)) else InsertFYoffset,
    InsertCompletedWeek = Table.AddColumn(RemoveToday, "WeekCompleted", each [WeekEnding] < Date.From(Date.EndOfWeek(CurrentDate)), type logical),
    InsertCompletedMonth = Table.AddColumn(InsertCompletedWeek, "MonthCompleted", each [MonthEnding] < Date.From(Date.EndOfMonth(CurrentDate)), type logical),
    InsertCompletedQuarter = Table.AddColumn(InsertCompletedMonth, "QuarterCompleted", each Date.EndOfQuarter([Date]) < Date.From(Date.EndOfQuarter(CurrentDate)), type logical),
    InsertChangedType = Table.TransformColumnTypes(InsertCompletedQuarter,{{"Year", Int64.Type}, {"QuarterOfYear", Int64.Type}, {"MonthOfYear", Int64.Type}, {"DayOfMonth", Int64.Type}, {"DateInt", Int64.Type}, {"DayOfWeek", Int64.Type}, {"ISO Weeknumber", Int64.Type}, {"WeeknYear", Int64.Type}, {"MonthnYear", Int64.Type}, {"QuarternYear", Int64.Type}, {"Fiscal Period", Int64.Type}, {"WeekOffset", Int64.Type}, {"MonthOffset", Int64.Type}, {"QuarterOffset", Int64.Type}, {"YearOffset", Int64.Type}, {"FiscalYearOffset", Int64.Type}})
  in
  InsertChangedType
in
fnDateTable

[AlB · Accepted solution]

@Anonymous 

1. That table on "Summary" does not have Month Name at the top level on rows. If you include it, it will display the same behaviour as the chart you showed initially

2.  Looks like that Excel chart only has WeekEnding on the x-axis as well. If on the PBI chart you include only that on the x-axis, you'll have the same result and no duplication.

Please mark the question solved when done and consider giving a thumbs up if posts are helpful.

Contact me privately for support with any larger-scale BI needs, tutoring, etc.

Cheers 

[Anonymous]

@AlBofcourse that makes perfect sense now, apologies for my ignorance. Thanks for your help and patience, much appreciated:)

[AlB]

@Anonymous 

Week ending on 06/12/20 has days both in November and December. So the measure will return values for both months. Same happens for week ending on 04/10/20. It's also shown twice, for September and October, and for the same reason. And same would happen to week ending on 01/11/20 it weren't because there is no data on table 'DistProfile v1-3'  for 01/11 (what makes the value for November blank and is thus not shown). Actually you will have this issue in most edge weeks, since it is more often than not that the final/initial week in a month  has days from two months.

I would avoid using the Auto Date/Time feature, as it can create unexpected problems (see https://community.powerbi.com/t5/Desktop/How-to-remove-Date-Hierarchy/td-p/647711)

Please mark the question solved when done and consider giving a thumbs up if posts are helpful.

Contact me privately for support with any larger-scale BI needs, tutoring, etc.

Cheers 

[Anonymous]

Thanks for clarifying this @AlB, makes sense. However it still doesn't explain the following:

1. the %Cumulative table below that chart in pbi Summary page is not splitting the dates like the line chart above i.e. look at "3" column. This represents DAY 3 which is the cut off day by which items should be delivered by to be classified as 'successfully delivered on-time', which matches the % values in chart above (except for the split dates i.e. 06/12, 04/10, etc)

     2. this chart/report in the Excel version is not showing the same issue (as per screenshot below) in terms of splitting the dates for those week ending values

Is there any way around this in terms of making the line chart week ending dates match the %Cumulative table and the Excel report version??

[AlB]

@Anonymous 

Is the file up to date? I only see dates up to the end of November on the tables and also on the SUMMARY page. The charts shows up to 29/11/2020 without problems. So it doesn't seem to be reproducing the problem

Please mark the question solved when done and consider giving a thumbs up if posts are helpful.

Contact me privately for support with any larger-scale BI needs, tutoring, etc.

Cheers 

[Anonymous]

sorry try this file

[AlB]

@Anonymous 

Can you share the full pbix, or a mock one that reproduces the problem? I'm afraid the M code for the date table only won't be enough to spot the problem

Please mark the question solved when done and consider giving a thumbs up if posts are helpful.

Contact me privately for support with any larger-scale BI needs, tutoring, etc.

Cheers 

[Anonymous]

@AlBhere is link to file