test
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extensions [nw] turtles-own [ adopted? ;; whether or not the agent has adopted the product ] to setup clear-all create-network seed reset-ticks end ;; seed the population with users who have already been given the product ;; you can either seed randomly or use betweenness centrality to seed if seeding-method = "random" [ ask n-of budget turtles [ set adopted? true update-color ] ] if seeding-method = "betweenness" [ ask max-n-of budget turtles [ nw:betweenness-centrality ] [ set adopted? true update-color ] ] end ;; create the social network to create-network if network-type = "random" [ create-random-network ] if network-type = "preferential-attachment" [ create-preferential-attachment ] end ;; the Barabasi-Albert method of creating a PA graph to create-preferential-attachment nw:generate-preferential-attachment turtles links 500 [ set size 2 set shape "circle" set color blue set adopted? false ] end ;; generate an Erdos-Renyi random graph to create-random-network nw:generate-random turtles links 500 0.004 [ set shape "circle" set color blue set size 2 set adopted? false ] end ;; simple loop just check to see if a turtle hasn't adopted then decide if they should adopt to go if all? turtles [ adopted? ] [ stop ] ask turtles with [ not adopted? ] [ decide-to-adopt ] ask turtles [ update-color ] tick end ;; the decision rule to adopt which is based on the Bass model of diffusion to decide-to-adopt ifelse random-float 1.0 < 0.01 [ set adopted? true ] [ if any? link-neighbors [ let neighbors-adoption count link-neighbors with [ adopted? ] / count link-neighbors if random-float 1.0 < 0.5 * neighbors-adoption [ set adopted? true ] ] ] end ;; ;; utility procedures ;; to update-color if adopted? [ set color red ] end to layout layout-spring turtles links 1 14 1.5 display end ; Copyright 2012 Uri Wilensky. ; See Info tab for full copyright and license.
There is only one version of this model, created over 6 years ago by Nicole lim.
Attached files
File | Type | Description | Last updated | |
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test.png | preview | Preview for 'test' | over 6 years ago, by Nicole lim | Download |
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