Adding Values from Two Lists

[Klaus_Munkholm]

Hi All.

Just started playing around with Dynamo, and have had some success, but this one got me stuck, and I’m hoping that someone can give me a pointer on how to proceed.

In a given room there´s X number of Windows - Each Window contains a DYN_Win_Area parameter (Shared, Instance) with is calculated within the families.

Each Room has a built-in “Area” parameter (Surprise)

My Rooms also have a DYN_Room_Area parameter (Shared, Instance), which I’m trying to get populated by Dynamo, with the SUM og the Dyn_Win_Area in the given Room PLUS the built in “Area” parameter.

Hope it makes sense…

DYN Test Room.Windows

[Vikram_Subbaiah]

[Klaus_Munkholm]

Thanks a lot Vikram.

Unfortunatly the “List.GetItemAtIndex” doesn´t behave the same way on my end… In your example you get the values right, but not here…

Is there a way to sort the list by Category (Rooms) instead?

SO close now - Thanks again.

[Vikram_Subbaiah]

Change the lacing on List.GetItemAtIndex to longest

[Klaus_Munkholm]

BRILLIANT ! Thank you very much