Use this to find what's in one group but not another — for example, which usages exist in your base model but were removed in a scenario, or which parcels dropped out of a site after a boundary change.
Set vs. List: a List (array) keeps items in order and can hold duplicates — you access items by position, like "the 3rd item." A Set has no order and no duplicates — adding an item that's already there does nothing, and there's no "position" to ask for. Sets are for asking "is this here?" and for comparing groups of things; Lists are for ordered, step-by-step sequences.
Category: Sets
Kind: Operation
Description: find the difference between two sets
Inputs
Name | Abbreviation | Type | Access | Description |
set1 | S1 | Set | Item | the first set |
set2 | S2 | Set | Item | the second set |
Outputs
Name | Abbreviation | Type | Access | Description |
difference | D | Set | Item | the difference of the two sets |
How to
Add the Difference Sets node.
Feed in two sets — order matters here.
The output is a new set containing only the items in "set1" that are not also in "set2".