What does "Quadratic sum" mean?

Question

[roy.granit]

I've used inferCNV to predict CNVs based on single cell expression data, and now I wish to calculate the "CNV score" as conducted in this publication.

It says: "The CNV score of each cell was calculated as quadratic sum of CNVregion"

The possible values are 0.5, 1.5, 2 - but what does "Quadratic sum" mean?

Is it sum of i^2 ? if so, isn't 0.5 is less represented vs 1.5?

Thanks!

[ATpoint]

If not documented I suggest asking it in the respective google user group to get expert answers from the developers. https://groups.google.com/forum/#!forum/trinity_ctat_users

[roy.granit]

Thanks, but the problem that the forum is not that active so I could not find an answer there..