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## Standard deviation of population in columns

Hello,

I need to calculate the standard deviation of a population made of monthly part sales (quantities). Each row gives the historic consumption (from 1 month in the past - Cons_1Month - to 12 months in the past - Cons_12Months ) of a part number - ITEMID.

I need the std.dev, for every rows (each p/n), of the population made of columns "Cons_1Month" to "Cons_12Months"

I prefer not to transpose as I have several other pieces of information I need to keep for each PN.

I found only ways to calculate std.dev per columns. Any idea ?

Thank you !

AC

2 REPLIES 2
Community Support

Hi, @ACU

If the following methods didn't solve your problem. Can you provide a PBIX file that is available for testing? What do you expect the results to look like that can be shown in an example Excel chart. I look forward to hearing from you.

Best Regards,

Community Support Team _Charlotte

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

Super User

Hi,

You could do the unpivot operation to a calculated table and use that new table with RELATED to calculate standard deviation to your original table.

Example DAX (add ID to its own column in the UNION):

coltable = UNION(
SELECTCOLUMNS('STDEV',"col",[1]),
SELECTCOLUMNS('STDEV',"col",[2]),
SELECTCOLUMNS('STDEV',"col",[3]),
SELECTCOLUMNS('STDEV',"col",[4]),
SELECTCOLUMNS('STDEV',"col",[5]),
SELECTCOLUMNS('STDEV',"col",[6]),
SELECTCOLUMNS('STDEV',"col",[7]),
SELECTCOLUMNS('STDEV',"col",[8]),
SELECTCOLUMNS('STDEV',"col",[9]),
SELECTCOLUMNS('STDEV',"col",[10]),
SELECTCOLUMNS('STDEV',"col",[11]),
SELECTCOLUMNS('STDEV',"col",[12]))
I hope this helps!

Proud to be a Super User!

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