I computed average DKI metrics in GM and WM with weighted average method. As a result, I have per each subject data like this: 0.4657913305627769 ± 0.40338811817089537.
Standand deviation is high likely due to noisy images. My question now is about how to use this wa ± std per each subject if, for example, I wanted to create boxplots per each metrics for all subjects. I usually create them starting from the mean for each subject (without the information of the std).
this is a bit out of the scope of this forum but you could use csv reading libraries to read your csv files and generate some stats.