Data tree question

Grasshopper
1

Hi!
Qick question about data tree handling that eludes me at the moment:

I’d like to convert this data tree
(1,2,3 | 4,5,6 | 7,8,9 | …)
into this
(1,4,7, … | 2,5,8, … | 3,6,9, …)

Thanks a lot!!

2

Sets–>Tree–>Flip Matrix

3

Ha! Of course… thanks you HS_Kim!!