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Rymatt830 Regular Visitor
Regular Visitor

Calculate the average of values across several columns in same row?

For each observation (row), I am trying to add a calculated column that displays the average across seven columns and I am stuck. I guess what I am looking for is a "row average" that will ignore null values. Here's the structure:

 

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For the first observation, PCODE 8411, the average of these seven columns, ignoring null values, is [(1+4+1+1)/4] = 1.75.

 

There are approximately 30 columns, so I only want to average these seven.

 

Any help would be great!

 

Thank you!

1 ACCEPTED SOLUTION

Accepted Solutions
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rdurkin Member
Member

Re: Calculate the average of values across several columns in same row?

@Rymatt830

You could do two calculated columns, one for total between all 7 columns, and one that calculates the number of non blank columns.

Avg Across columns.png

Total Across Columns:=([a]+[b]+[c]+[d]+[e]+[f]+[g])

 

Non Blank Columns =IF(ISBLANK([a]),0,1)+IF(ISBLANK([b]),0,1)+IF(ISBLANK([c]),0,1)+IF(ISBLANK([d]),0,1)+IF(ISBLANK([e]),0,1)+IF(ISBLANK([f]),0,1)+IF(ISBLANK([g]),0,1)

 

Avg=[Total across columns]/[Non Blank Columns]

 

Please mark it as a solution or give a kudo if it works for you, otherwise let me know if you run into an issue and I'll do my best to assist. 

 

Thanks,

Ryan Durkin

 

8 REPLIES 8
Highlighted
rdurkin Member
Member

Re: Calculate the average of values across several columns in same row?

@Rymatt830

You could do two calculated columns, one for total between all 7 columns, and one that calculates the number of non blank columns.

Avg Across columns.png

Total Across Columns:=([a]+[b]+[c]+[d]+[e]+[f]+[g])

 

Non Blank Columns =IF(ISBLANK([a]),0,1)+IF(ISBLANK([b]),0,1)+IF(ISBLANK([c]),0,1)+IF(ISBLANK([d]),0,1)+IF(ISBLANK([e]),0,1)+IF(ISBLANK([f]),0,1)+IF(ISBLANK([g]),0,1)

 

Avg=[Total across columns]/[Non Blank Columns]

 

Please mark it as a solution or give a kudo if it works for you, otherwise let me know if you run into an issue and I'll do my best to assist. 

 

Thanks,

Ryan Durkin

 

Super User
Super User

Re: Calculate the average of values across several columns in same row?

@Rymatt830 easy way to do is go to query editor after importing your data, make sure data type of seven columns is whole number.

 

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Then select all seven columns, under Transform tab click Unpivot Columns. This will give you table as below.

 

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Then under Transform tab click Group By and fill details as below and click OK.

 

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Close&Apply and everytime you refresh you will get these steps applied.

 

 

 

Rymatt830 Regular Visitor
Regular Visitor

Re: Calculate the average of values across several columns in same row?

Thank you for the suggestion, and this solution would be ideal if I didn't have 30 additional columns in my query. Also, I have a lot of records in the query so duplicating it may be a bad idea.

Super User
Super User

Re: Calculate the average of values across several columns in same row?

You can add a column in the query editor like this:

 

Table.AddColumn(#"PreviousStep", "NNCount", each List.NonNullCount({[A],[B]}))

Did I answer your question? Mark my post as a solution!

Proud to be a Datanaut!

Imke Feldmann

How to integrate M-code into your solution -- Check out more PBI- learning resources here -- Performance Tipps for M-queries




Rymatt830 Regular Visitor
Regular Visitor

Re: Calculate the average of values across several columns in same row?

Hi Imke,

 

Thank you for the response. This looks like a great solution; but, can you explain it in more detail, please? Do the "A" and "B" reference column names? So, would the formula for my data be,

 

Table.AddColumn(#"PreviousStep", "NNCount", each List.NonNullCount({[Bin (DSCR)],[Bin (NCF)], [Bin (OpEx)] ...}))

 

Rymatt830 Regular Visitor
Regular Visitor

Re: Calculate the average of values across several columns in same row?

Thanks, rdurkin, this is a great solution.

Super User
Super User

Re: Calculate the average of values across several columns in same row?

That's correct: List.NonNullCount counts the number of items in your list that are not null. So you don't have to write a condition for every column separately.

Did I answer your question? Mark my post as a solution!

Proud to be a Datanaut!

Imke Feldmann

How to integrate M-code into your solution -- Check out more PBI- learning resources here -- Performance Tipps for M-queries




alapandaman Occasional Visitor
Occasional Visitor

Re: Calculate the average of values across several columns in same row?

Greetings!

 

How can you average two columns generating random numbers at the same time. The average result is not correct in output. Is it possible or not?

 

Query

 

Field:           ITR                     PRIMER DFT MIN: Int((90-75+1)*Rnd([ITR])+75)      PRIMER DFT MAX: Int((90-5+1)*Rnd([ITR])+75)        AVE: ([PRIMER DFT MIN]+[PRIMER DFT MAX])/2

Table:          DFT Readings   

 

Run Output

ITR         PRIMER DFT MIN         PRIMER DFT MAX       AVE

1                     82                                   87                      86

2                     75                                   78                      76

3                     77                                   85                      81

 

Your response will be highly appreciated.

 

Thanks,

 

Alex