inlunarweektodate - script and chart function

This function returns true if timestamp lies inside the part of the lunar week up to and including the last millisecond of base_date. Lunar weeks in QlikView are defined by counting 1 January as the first day of the week.

Syntax:  

InLunarWeekToDate (timestamp, base_date, period_no [, first_week_day])

Return data type: Boolean

Arguments:  

Example 1:  

inlunarweektodate('12/01/2013', '13/01/2013', 0)

Returns True. Because the value of timestamp, 12/01/2013 falls in the part of the week 08/01/2013 to 13/01/2013.

Example 2:  

inlunarweektodate('12/01/2013', '11/01/2013', 0)

Returns False. Because the value of timestamp is later than the value base_date even though the two dates are in the same lunar week before 12/01/2012.

Example 3:  

inlunarweektodate('12/01/2006', '05/01/2006', 1)

Returns True. Specifying a value of 1 for period_no shifts the base_date forward one week, so the value of timestamp falls in the part of the lunar week.

Example 4:  

Add the example script to your document and run it. Then add, at least, the fields listed in the results column to a sheet in your document to see the result.

This example checks if an invoice date falls in the part of the week shifted from the value of base_date by four weeks.

TempTable:

LOAD RecNo() as InvID, * Inline [

InvDate

28/03/2012

10/12/2012

5/2/2013

31/3/2013

19/5/2013

15/9/2013

11/12/2013

2/3/2014

14/5/2014

13/6/2014

7/7/2014

4/8/2014

];

 

InvoiceData:

LOAD *,

InLunarWeekToDate(InvDate, '07/01/2013', 4) AS InLWeek2DPlus4

Resident TempTable;

Drop table TempTable;

The resulting table contains the original dates and a column with the return value of the inlunarweek() function.

The function returns True for the value of InvDate5/2/2013 because the value of base_date, 11/01/2013, is shifted by four weeks, and so falls in the part of the week 5/02/2013 to 07/02/2013.