Forum Discussion
Dynamic Array Subtotal that changes its column sizes without using VBA or volatile functions
you should be able to have nested Lambda functions. not sure what issue you had.
You could also just use the Project_Duration, Criteria1, Criteria2 as inputs:=LAMBDA( ProjectDuration, Criteria1, Criteria2, LET(criteria, --FILTER(TAKE(Criteria1:ProjectDuration, , -COLUMNS(ProjectDuration)), (TAKE(Criteria1:ProjectDuration, , 1) = Criteria1) * (TAKE(Criteria2:ProjectDuration, , 1) = TEXTBEFORE(Criteria2, " Subtotal"))), MMULT(SEQUENCE(, ROWS(criteria)) ^ 0, criteria)))
and BTW this worked for me:=LAMBDA(ProjectDuration, Criteria1, Criteria2, LET(criteria, --FILTER(TAKE(Criteria1:ProjectDuration, , -COLUMNS(ProjectDuration)), (TAKE(Criteria1:ProjectDuration, , 1) = Criteria1) * (TAKE(Criteria2:ProjectDuration, , 1) = TEXTBEFORE(Criteria2, " Subtotal"))), BYCOL(criteria, LAMBDA(c, SUM(c)))))
=BYCOL(FILTER(DROP($D$6:$D10,-1,):TAKE($D$6#,,-1),(DROP($A$6:$A10,-1,)=$A10)*(DROP($B$6:$B10,-1,)=TEXTBEFORE($B10," Subtotal")),0),LAMBDA(c, SUM(c)))
mtarler No need to worry about a circular reference occurring in this case, because the filter criteria TEXTBEFORE(B10, " Subtotal") will never evaluate to TRUE on row 10 (or on any subtotal row where the formula is copied to). Even if you were to mistakenly omit the " Subtotal" label in cell B10, TEXTBEFORE would simply return the #N/A error, which cannot be processed by the FILTER function, so no circular reference will occur.
The same principle applies to the SUMIFS function. For example, if the following formula was used in cell D10, it would process correctly without producing a circular reference warning, because the criteria does not evaluate to TRUE on row 10:
=SUMIFS($D$8:$D$26, $A$8:$A$26, A10, $B$8:$B$26, TEXTBEFORE(B10," Subtotal"))
On a side note, seeing the TAKE function in your solution made me realize I can use TAKE, rather than DROP, to simplify the third example in my original post as follows:
=LET(
arr, DROP($D$7#:A10, 1),
data, FILTER(TAKE(arr,, -COLUMNS($D$7#)),
(CHOOSECOLS(arr, 1)=A10)*(CHOOSECOLS(arr, 2)=TEXTBEFORE(B10, " Subtotal"))),
BYCOL(data, LAMBDA(c, SUM(c))))
TAKE(arr,, -COLUMNS($D$7#)) is much better than DROP(arr,, COLUMNS(arr)-COLUMNS($D$7#)), so thank you for that! 😉
djclements so that is interesting. When I first tried it I thought I got an error like #VALUE or #NA error which I was assuming was a circular reference error just manifesting that way. I know it wouldn't actually be a circular reference but in the past it seemed excel flagged anything that could. Well, I just cleaned my solution up to not use the DROPs and seems fine. we don't even need that TAKE($D$6#,,-1) so:
=BYCOL(FILTER($D$6#:$D10, ($A$6:$A10=$A10)*($B$6:$B10=TEXTBEFORE($B10," Subtotal")),0), LAMBDA(c, SUM(c)))mtarler Looking at your elegant solution inspired by djclements, I found a way to make my last attempt formula fully dynamic below:
=LET(Criteria,($A$5:$A$25=A9)*($B$5:$B$25=TEXTBEFORE($B9," Subtotal")), MMULT(TRANSPOSE(FILTER(Criteria,Criteria=1)),--FILTER($D$5#:$D$25,Criteria=1)) )By simply changing the range from $D$8:$L$26 to $D$5#:$D$25 where it's the combo of the spilled range and the last row & first column cell, it works as intended. I also could make a custom function out of this (named MONTHLYTOTAL):
=LAMBDA(criteria1_range,criteria1,criteria2_range,criteria2,project_duration,last_cell, LET(Criteria,(criteria1_range=criteria1)*(criteria2_range=TEXTBEFORE(criteria2," Subtotal")), MMULT(TRANSPOSE(FILTER(Criteria,Criteria=1)),--FILTER(project_duration:last_cell,Criteria=1))) )The custom function below can be copiable in column D :
=MONTHLYTOTAL($A$5:$A$25,A9,$B$5:$B$25,$B9,$D$5#,$D$25)I couldn't convert both of your solutions into custom functions. I'm guessing those two have LAMBDA already and you can't have a nested LAMBDA function...?
It would be great if I can avoid using the last_cell ($D$25 in $D$5#:$D$25) somehow by referring to the criteria1 range instead, but I'm just happy with all of the solutions here working well 🙂
mtarler Alternatively, I revised your formula that refers to the subtotal cell itself (D9) which I think is neater than referring to the last cell of the monthly hours table.
=LET(CriteriaArray,--FILTER(D5#:$D9,($A$5:$A9=$A9)*($B$5:$B9=TEXTBEFORE($B9," Subtotal"))), MMULT(SEQUENCE(,ROWS(CriteriaArray))^0,CriteriaArray) )The custom function will be:
=LAMBDA( project_duration,monthly_subtotal_cell,criteria1_begin,criteria1,criteria2_begin,criteria2, LET(CriteriaArray,--FILTER(project_duration:monthly_subtotal_cell,(criteria1_begin:criteria1=criteria1)*(criteria2_begin:criteria2=TEXTBEFORE(criteria2," Subtotal"))), MMULT(SEQUENCE(,ROWS(CriteriaArray))^0,CriteriaArray)) )It looks like below:
mtarler Great! That now looks like the simplest possible solution! 🙂
mtarler, djclements Appreciate the work of two great minds, it is indeed the simplest solution I didn't expect to be possible 🙂
