Indicator vector

An indicator vector is like a checklist that tells you whether something is "on" or "off". It's like having a bunch of switches that you can turn on and off to show if something is true or false. Each switch in the indicator vector represents a different thing you want to check. If the switch is turned on, that means that thing is true. If the switch is turned off, that means that thing is false. It's a really handy tool for keeping track of lots of different things at once!