Calculating Standard Deviation with Confiforms

[alex b]

Hello,

I am trying to find a way to calculate the standard deviation for data inside of a confiform table. The issue I run into is that when using the tableview merger and field macros it only resolves summations and thus the square root property is not calculated properly. I have not been able to figure out a way to implement IFTTT or a field rule in order to collect the data from previous entries in order to calculate this value either.

Im not skilled with Javascript and was wondering if anyone had any tips or solutions to this issue.

[Natalie Paramonova _Stiltsoft_ · Accepted solution]

Hi @alex b ,

You can calculate the standard deviation with the help of the Table Transformer macro bundled in the Table Filter and Charts for Confluence app. The app is compatible with ConfiForms.

1. Place the macro outputting tables within the Table Transformer macro body:

2. Use the following SQL query (select the functions depending on what you'd like to calculate):

SELECT
MEDIAN(T1.'Value') AS 'Median',
STDDEV(T1.'Value') AS 'Standard deviation population',
STDEV(T1.'Value') AS 'Standard deviation sample',
VAR(T1.'Value') AS 'Variance sample',
VARP(T1.'Value') AS 'Variance population'
FROM T1

Where 'Value' is the label of the column from the source table with values, 'Median' and others are the labels of new outputted columns with results.

The result is as follows:

Please let me know if you have any questions.

[alex b]

Thank you! That was super easy to follow. Much appreciated!

[Natalie Paramonova _Stiltsoft_]

You are welcome!

[Alex Medved _ConfiForms_ · Accepted solution]

You cannot do that with a ConfiForms TableViewMerger (or setting the expression in the ValueView), as the calculations are done per row / record

But you can do it with a little help of JavaScript and using ConfiForms REST APIs, as shown here, on our wiki - https://wiki.vertuna.com/display/TEST/Averages%2C+totals%2C+sums+and+standard+deviation+calculation

[alex b]

Thank you for the help! Much appreciated.