试图计算评级系统的平均分数

Question

I am trying to calculate an average score. I have a rating system set up from 1-5 and they are divided by colors.
I have a few columns that are days in one month and for some ratings/colors I have some random data which acts as votes for each rating.
Is there a way to calculate the average score?

The data is set like this:

Score   07/01/2019  08/01/2019  09/01/2019  
1        1           0           2  
2        0           0           1  
3        1           0           0  
4        0           0           0  
5        0           0           0  

Answer 1

If I understand your question correctly, you want to calculate an average for all, ignoring the 0 entries, which presumably are not scores given your 1-5 scoring methodology. If so, try this (assuming "Score" is in cell A1):

=SUM(B2:D6)/COUNT(B2:D6)

Answer 2

Per your comment above you want the average score per day. So you need to multiple the score (column A) against the number of votes for that score (column B, C, D depending on date.

If your table above goes from A1:D6, then put this in B7

=SUMPRODUCT($A$2:$A$6,B2:B6)/SUM(B2:B6)

This gives you an average of 2 for 7/1 Because (1*1 +3*1)/2 =2.

You can copy the formula across to C7, D7 etc.

You will get a "DIV/0" error if you have no votes. This can be made more pretty as follows:

=IFERROR(SUMPRODUCT($A$2:$A$6,B2:B6)/SUM(B2:B6),"No votes")

All this does is say "No Votes" instead of returning an error. You could change the text to anything, or leave it "" for a blank cell if you want.

If you wanted the score for the whole lot, you can use this (eg put it in A10 or wherever using an array formula . You will need to enter the forumale then press ctrl-shift-enter otherwise it will not work.

=SUM(A2:A6*B2:D6)/SUM(B2:D6)

if it works, you should get the answer 1.6 and you will see { } in the formula bar after you press ctrl-shift-enter.

PS I don't think that the accepted answer will give you average score. It will give you average number of votes. You can test this by putting all the votes in row 6 and seeing that the average score won't increase.