natVelocity {dbnR}

R6 class that defines velocities in the PSO

Description

Constructor of the 'natVelocity' class. Only difference with the natCauslist one is that it has a negative cl attribute.

Getter of the abs_op attribute.

return the number of operations that the velocity performs

Setter of the abs_op attribute. Intended for inside use only. This should be a 'protected' function in Java-like OOP, but there's no such thing in R6. This function should not be used from outside the package.

Randomizes the Velocity's directions.

Given two positions, returns the velocity that gets the first position to the other one.

Add both velocities directions

Multiply the Velocity by a constant real number

This function multiplies the Velocity by a constant real number. It is non deterministic by definition. When calculating k*|V|, the result will be floored and bounded to the set [-max_op, max_op], where max_op is the maximum number of arcs that can be present in the network.

Arguments

ordering

a vector with the names of the nodes in t_0

ordering_raw

a vector with the names of the nodes without the appended "_t_0"

max_size

maximum number of timeslices of the DBN

n

the new number of operations that the velocity performs

probs

the weight of each value -1,0,1. They define the probability that each of them will be picked

p

the parameter of the geometric distribution

ps1

the origin natPosition object

ps2

the objective natPosition object

vl

a Velocity object

k

a real number

Details

The velocities will be defined as two natural vectors where each element in them represents the arcs from a temporal family of nodes to a receiving node. 1-bits in the binary representation of this number represent arc additions/deletions

Value

A new 'natVelocity' object

the natVelocity that gets the ps1 to ps2

Fields

abs_op

Total number of operations 1 or -1 in the velocity

max_size

Maximum number of timeslices of the DBN

cl_neg

Negative part of the velocity