Ps-i 2.2 - attributes

General description

Section format

attribute 'influence'
	type int
	smallest 0
	largest 1000
	default 1
end

Available keywords
Keyword	Value	Attribute type	Description
type	int, bool, repertoire, set		Declares type of the attribute. Should be followed by one of bool,int, set or repertoire. Note: currently set is not fully implemented
default	e.g. 10	any	Specifies default value (optional)
smallest	e.g. -3	int	Specifies smallest possible value
largest	e.g. 200	int	Specifies largest possible value
size	e.g. 10	set, repertoire	Specifies size of the set or repertoire. Limited to 64 for sets and 56 for repertoires.
bias_min	e.g. 4	repertoire	minimum possible value for bias. (valid only for attributes of type repertoire)
bias_max	e.g. -3	repertoire	maximum possible value for bias. (valid only for attributes of type repertoire)
bias_vol	e.g 500	repertoire	likelihood that a given bias value will change on this timestep. (in units of 0.01%) (valid only for attributes of type repertoire)
walk	no argument	repertoire	during evolution a particular bias value can only change by +1 or -1 during one timestep
jump	no argument	repertoire	during evolution a particular bias value can change to any possible value during one timestep
bias_values	e.g. 1,-1,2,3	repertoire	this keyword is used to specify initial bias values. it is only used in snapshots and will _never_ be accessed if loading as a model.
bias_init_routine	e.g. "bias_init"	repertoire	specifies a routine to define initial values for bias
bias_update_routine	e.g. "bias_update_jump"	repertoire	Specifies a routine for updating bias values. When present, keywords jump, walk, bias_max, bias_min and bias_vol are disregarded.

More examples

attribute 'immutable'
	type bool
	default false
end

routine 'bias_init' composite
	comment 'This sets initial biases to zero for all identities except first'
	when "$1==1"  "-1"
	default "0"
end

routine 'bias_update1' composite
	comment 'Set 2 to 0 always, otherwise jump randomly between -5 and 4'
	when "$1==2" "0"
	default "(rand/1000)-5"
end

attribute 'cache'
	type repertoire
	walk
	size 20
	bias_max 2
	bias_min -2
	bias_vol  500
	default empty
	bias_init_routine "bias_init"
	bias_update_routine "bias_update1"
end

Related