simulation - How does the `find-partner` procedure in Preferential Attachment work? -


i have netlogo model has separate procedures set both small world , erdos-renyi network. user can specify network create , number of nodes each of these using sliders specify numbers of each breed want e,g erdos renyi network...

my model used simulate spread of measles through network

   setup-erdos-renyi   clear-all   ;; make circle of turtles   set num-nodes (num-children + num-adults + num-toddlers)     create-children num-children     create-adults num-adults     create-toddlers num-toddlers     layout-circle turtles (max-pxcor - 8)   ;; give each pair of turtles equal chance   ;; of creating link   ask turtles [     ;; use "self > myself" here each pair of turtles     ;; considered once     create-links-with turtles [self > myself , random-float 1.0 < probability]    ]   setup   infect-initial         ask links [set closed? false]         display             reset-ticks      end

what i'd implement option simulate preferential attachment between these turtles.

i've been looking @ supplied preferential attachment model comes in built in netlogo, i'm having hard time applying model. struggling understand how 

to-report find-partner   report [one-of both-ends] of one-of links end

this snippet serves find each node partners in example model, based on number of links mode has causing preferential attachment?

i believe 1 solution seed random set of links use snippet create more links pre determined number of links.

of snippet of code:

to-report find-partner   report [one-of both-ends] of one-of links end

you asked "is based on number of links node has causing preferential attachment?"

the answer yes. understanding why bit subtle. instead of picking node directly first pick random link, , use lead node. why work?

well, example, suppose node has 100 links connected it, node b has 1 link connected it. if pick link @ random, it's 100 times likelier we'll pick link connected a, link connected b. , that's our goal — node's chance of being picked proportional link count.


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