Calculating variance from multiple columns from the same table

[P_P2595]

Hi Team,

I have the below input and want to calculate variance based on the description column. also want the output to be in table or matrix form.

Input:

id	description	symptoms	conduct_problem	hyperactivity	problem	prosocial	impact	score
150	Start	4	7	10	8	6	4	15
150	End	3	5	8	4	7	7	7
160	Start	7	3	5	7	4	10	18
160	Start	5	5	5	6	2	8	16
160	End	5	5	5	6	2	6	13
160	End	5	4	4	9	2	8	18
164	Start	7	2	2	5	6	10	19
164	End	5	4	2	5	8	7	14
173	Start	9	7	10	7	4	4	10
173	End	8	7	9	7	2	9	8
188	Start	7	3	7	0	9	6	9
188	End	7	3	5	0	6	5	16
189	Start	6	8	10	5	7	4	12
189	End	4	6	9	4	7	2	11

Expected output:

Scale	Start	End	diff
symptoms	6.43	5.29	1.14
conduct_problem	5.00	4.86	0.14
hyperactivity	7.00	6.00	1.00
problem	5.43	5.00	0.43
prosocial	5.43	4.86	0.57
impact	6.57	6.29	0.29
score	14.14	12.43	1.71
all Total	50.00	44.71	5.29

Please not that the value of Start and End is the average value based on id column. and the all Total is the summantion of the 7 rows.

Is this possible in power bi?

Thanks in advance.

[amitchandak · Accepted solution]

@P_P2595 , Unpivot the all column other than Id and description , then you can have measures like

M1 = calculate(Average(Table[Value]), filter(Table, Table[Description] ="Start") )

M2= calculate(Average(Table[Value]), filter(Table, Table[Description] ="End") )

Diff = [M1] -[M2]

Learn Power BI: Power Query UnPivot Data, Pivot Data, Transpose Data, Query Fill Up, Fill Down: https://www.youtube.com/watch?v=cN8AO3_vmlY&t=36407s

Unpivot Data(Power Query): https://youtu.be/2HjkBtxSM0g

[Ahmedx · Accepted solution]

Based on your description, I created data to reproduce your scenario. The pbix file is attached in the end.
https://1drv.ms/u/s!AiUZ0Ws7G26RiGy6Yf6quAn_ATjG?e=zsB0R6

[P_P2595]

Hi all,
Thanks for your solutions and it’s working for me. Is it possible to get the same output without unpivoting the columns as I have some pages and visuals with that table and extra columns than the input data and I don't want to unpivot the data because it's affecting other pages and visuals.
Is there any other way to get the expected output by creating a measure and calculated column?
Thank you so much.
Greatly appreciate your answers.

[Ashish_Mathur · Accepted solution]

Hi,

Please find attached my solution file.

Hope this helps.

[Ahmedx · Accepted solution]

Based on your description, I created data to reproduce your scenario. The pbix file is attached in the end.
https://1drv.ms/u/s!AiUZ0Ws7G26RiGy6Yf6quAn_ATjG?e=zsB0R6

[amitchandak · Accepted solution]

@P_P2595 , Unpivot the all column other than Id and description , then you can have measures like

M1 = calculate(Average(Table[Value]), filter(Table, Table[Description] ="Start") )

M2= calculate(Average(Table[Value]), filter(Table, Table[Description] ="End") )

Diff = [M1] -[M2]

Learn Power BI: Power Query UnPivot Data, Pivot Data, Transpose Data, Query Fill Up, Fill Down: https://www.youtube.com/watch?v=cN8AO3_vmlY&t=36407s

Unpivot Data(Power Query): https://youtu.be/2HjkBtxSM0g