Sorting categories by three parameters

[Marcin_Wozniak]

Hi,

I am having a problem with sorting Revit categories by three parameters, I am quite new to Dynamo.

I have no problem with doing it on two parameters:

What I want to do is take three parameters from the Rooms category (“Area”, “Level”, “Name”) and create a list for each “Name” including sum of all the areas on each “Level”.
Lists should look like:

1. Name 1 (GEA): Level 00: sum of all GEA areas from level 00; Level 01: sum of all GEA areas from level 01.
2. NAme 2 (GIA): Level 00: sum of all GIA areas from level 00; Level 01: sum of all GIA areas from level 01.

This is what I have so far, as a start. I tried many combinations of sorting but I cant get it right.

Thanks for help.

[Nick_Boyts]

You need to sort everything by the same key so your list structure stays the same. Then you can group them.

[Marcin_Wozniak]

Thank you!
Totally forgot to replay.
Works great!