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Set attribute

BehaviourComposer: ignore everything before this.

Begin micro-behaviour:
Begin description:
Set an attribute, parameter, or Netlogo variable to a new value.
End description

New value

Begin NetLogo code:
substitute-text-area-for attribute-name my-attribute
substitute-text-area-for attribute-value value-of-attribute
set attribute-name 
    attribute-value
End NetLogo code

Variants

Change the attribute name in the first text area to whatever attribute you want to create or set. If the name begins with 'my-' or 'my-next-' then the system will treat it as an attribute of an agent. If the name ends with '-of-patch' then it treated as an attribute of the patch running this behaviour. If it begins with 'the-' then it is treated as a parameter (i.e. global or model variable). Otherwise it is assumed to be a NetLogo variable.

The second text area can contain any value or an expression that will evaluate to a value. To repeatedly update an attribute use the 'Enhance' menu to make this repeat.

Examples using this behaviour include: Set my-heading to a random angleIncrease the age attribute on every tick, and  Set the pen mode to 'down' so a trail is left as this agent moves. 

How this works

The BehaviourComposer treats specially variables whose name begins with "my-" or "my-next-". Note that, unlike NetLogo, you don't need to declare "breed" variables. More details in the programming guide.

Related micro-behaviours

History

New value was implemented by Ken Kahn.
BehaviourComposer: ignore everything after this.
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