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DaeyunPablo's avatar
DaeyunPablo
Brass Contributor
Thanks a lot for catching the error! I updated the attached file. I'll be waiting for an alternative to REDUCE/STACK method as well. There's a project I'm working on and and that method gets quite heavy if there are lots of inputs and the formula become complex. It's still great, but I'd like to try a new one if it's more efficient.
djclements's avatar
djclements
Bronze Contributor
Aug 09, 2024

DaeyunPablo Here's my array manipulation variant, using TOCOL, IF, SORTBY and WRAPROWS:

 

=LET(
    wrap_count, 3,
    start_date, MIN(B7:B15),
    end_date, MAX(B7:B15),
    months, CEILING.MATH((YEAR(end_date) - YEAR(start_date)) * 12 + MONTH(end_date) - MONTH(start_date) + 1, wrap_count),
    month_start, DATE(YEAR(start_date), MONTH(start_date) + SEQUENCE(months,, 0), 1),
    period_start, month_start - WEEKDAY(month_start) - 13,
    period_end, period_start + 55,
    seq_start, MIN(period_start),
    all_dates, SEQUENCE(, MAX(period_end) - seq_start + 1, seq_start),
    test, (period_start > all_dates) + (period_end < all_dates),
    period_dates, TOCOL(IF(test, NA(), all_dates), 2),
    first_dates, TOCOL(IF(test, NA(), month_start), 2),
    wrap_ID, INT(SEQUENCE(ROWS(period_dates),, 0) / (wrap_count * 56)),
    week_ID, TOCOL(IF(SEQUENCE(months), TOROW(IF(SEQUENCE(, 7), SEQUENCE(8))))),
    sort_ID, wrap_ID * 8 + week_ID,
    output, IF(week_ID = 1, IF(WEEKDAY(period_dates) = 4, TEXT(first_dates, "mmm-yyyy"), ""),
        IF(week_ID = 2, TEXT(period_dates, "ddd"), IF(MONTH(period_dates) = MONTH(first_dates), period_dates, 0))),
    WRAPROWS(SORTBY(output, sort_ID), wrap_count * 7)
)

 

Change the wrap_count if you want to output 2 or 4 months across, for example. I expanded the conditional formatting rules to accommodate up to 4 months across for demonstration purposes, but you could expand them further, if desired.

 

EDIT: after testing it with a larger date range (with the conditional formatting rules removed), it didn't hold up as well as I'd hoped. The REDUCE / STACK method was actually faster... so sad 😞

  • DaeyunPablo's avatar
    DaeyunPablo
    Brass Contributor
    Aug 11, 2024
    Unfortunate, I was hoping to see an alternative which can be used in general instead of REDUCE/STACK method... But nice version of yours, looking at it I updated my formula which has the 3rd input 'mth_in_row_num' to expand/shrink the calendar horizontally.

    Please do let us know if you come up with a faster alternative later!

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