Difficulty in formulas

[JoeAkpan28]

Good day, nice to have a nice community like this. 

I'm hooked on a task that i gave myself on market basket analysis, i have tried over 6 different combination of functions but i have been getting '0' or 'ref error'. i aim to count the number of times two items appear on the same row.

  

[#2]

@JoeAkpan28 

Hi,

Could you specify your desired output?

You wish to know how many rows are there with two columns of "ingredients"? That is, row 2 and 3 would not be counted but 4 and 5 would be?

Thanks.

[#3]

@MAngosto i want to count the number of times that two(2) independent products appear on the same row, and there are not just in 1 or 2 specific columns. they're scattered randomly in 11 columns.

If you do help me, i would really appreciate.

[#4]

@JoeAkpan28 

=SUM((COUNTIFS(OFFSET($A$2:$K$2,ROW($1:$8)-1,0),P9)>0)*(COUNTIFS(OFFSET($A$2:$K$2,ROW($1:$8)-1,0),Q9)>0))

This formula works in my sheet. The formula must be entered as an arrayformula with ctrl+shift+enter if someone doesn't work with Office 365 or Excel for the web or Excel 2021.

[#5]

@JoeAkpan28 

=MAP(P9:P17,Q9:Q17,LAMBDA(fruit1,fruit2,SUM(BYROW(A2:K9,LAMBDA(r,(COUNTIFS(r,fruit1)>0)*(COUNTIFS(r,fruit2)>0))))))

With Office 365 or Excel for the web you can apply this formula which spills the result.

[#6]

@OliverScheurich  I really appreciate your efforts. Also, The formula doesn't work and then it highlights this particular r as if something is wrong with it

[#7]

@OliverScheurich i don't understand this particular formula, and i can't edit it properly

[#8]

@JoeAkpan28 

=MAP(R6:R13,S6:S13,LAMBDA(fruit1,fruit2,SUM(BYROW(A2:K14000,LAMBDA(r,(COUNTIFS(r,fruit1)>0)*(COUNTIFS(r,fruit2)>0))))))

=MAP(R6:R13,S6:S13,LAMBDA(fruit1,fruit2,SUM(BYROW(A2:K14000,LAMBDA(x,(COUNTIFS(x,fruit1)>0)*(COUNTIFS(x,fruit2)>0))))))

In the attached file i've made an example according to the size of your database. From your screenshot i can't tell why the formula shouldn't work. You can try replacing r by x. Both formulas return the same result in my sample file.

[#9]

@JoeAkpan28 

=SUM((COUNTIFS(OFFSET($A$2:$K$2,ROW($1:$14963)-1,0),R6)>0)*(COUNTIFS(OFFSET($A$2:$K$2,ROW($1:$14963)-1,0),S6)>0))

I've adjusted the formula according to the actual size of your data. The formula must be entered as an arrayformula with ctrl+shift+enter if you don't work with Office 365 or Excel for the web.

=MAP(R6:R13,S6:S13,LAMBDA(fruit1,fruit2,SUM(BYROW(A2:K14964,LAMBDA(x,(COUNTIFS(x,fruit1)>0)*(COUNTIFS(x,fruit2)>0))))))

However if you work with Office 365 or Excel for the web you can apply the LAMBDA and MAP formula.

[#10]

Now i understand better. My dataset has 14964 rows and 11 columns

[#11]

@JoeAkpan28 

=SUMPRODUCT(((($A$2:$A$14964=R6)+($B$2:$B$14964=R6)+($C$2:$C$14964=R6)+($D$2:$D$14964=R6)+($E$2:$E$14964=R6)+($F$2:$F$14964=R6)+($G$2:$G$14964=R6)+($H$2:$H$14964=R6)+($I$2:$I$14964=R6)+($J$2:$J$14964=R6)+($K$2:$K$14964=R6))>0)*((($A$2:$A$14964=S6)+($B$2:$B$14964=S6)+($C$2:$C$14964=S6)+($D$2:$D$14964=S6)+($E$2:$E$14964=S6)+($F$2:$F$14964=S6)+($G$2:$G$14964=S6)+($H$2:$H$14964=S6)+($I$2:$I$14964=S6)+($J$2:$J$14964=S6)+($K$2:$K$14964=S6))>0))

Another alternative which works in Excel 2013 and in Office 365 is this formula.

[#12]

@OliverScheurich , @JoeAkpan28 

As variant

=SUM(
    (MMULT(--($A$2:$K$14964=R6), TRANSPOSE(--(COLUMN($A$1:$K$1)>0)))>0 )*
    (MMULT(--($A$2:$K$14964=S6), TRANSPOSE(--(COLUMN($A$1:$K$1)>0)))>0 )
)