如何计算某些行范围之间的数字？

Question

i would like to count number for every 7 rows, data are in one column. i use this formula, but it is not working.

from B8 to B14329 , for every 7 rows, count number if it is equal to 3. so i know how many 3 in every 7 rows.

=COUNTIFS(B8:B14329, OFFSET($B$7,(ROW()-12)*7,0,7,1),B8:B14329,=3)

Thanks a lot! i want something like this:

data  count
3    
2   
3   
1   
3   
3   
1       4
1   
2   
2   
3   
3   
1   
1       2
.....
....
...

Answer 1

Simple and easy:

=SUMPRODUCT((B8:B14329=3)*(MOD(ROW(B8:B14329),7)=1))

Just change the =1 to your needs. To start with row 1 =1 , 2 =2 ... 6 =6 , 7 =0 . This way, to start count at row 8 it is =1

EDIT : having your exaple now, you want something completely different... lol.

=IF(MOD(ROW(),7)=0,COUNTIF(A8:A14,3),"")

Put this in row 14 and then drag down... change the =0 as you need it.

Answer 2

Here's what I would do

• Add a new column with the row index (8 to 14239) in your case
• Add Yet another column, with a formula to tell whether the column you just added is a multiple of 7. Put it's value like "TRUE" or "FALSE"

You can use the MOD function to check the remainder of the division.

= MOD ( Number , Divisor )

By now, you should have, aside from the columns you already have, something like:

8-----FALSE

9-----FALSE

10-----FALSE

11-----FALSE

12-----FALSE

13-----FALSE

14-----TRUE

15-----FALSE

Once you have that, just apply a filter on the "TRUE/FALSE" column, select the "TRUE" values and you will be able to count the number of "3"s on the actual value column, by also using a filter on it.

I hope it helps, and it's easier than a really messy formula.