NW:load-graphml seems to ignore random-seed

[Simone Gabbriellini]

Hello,

I am trying to process some network data using the nw extensions, and I am stuck with setting the seed in order to have reproducible runs.

If you create a network like this, you can set the random seed and every time you call the procedure you have a network in the same exact layout:

to setup

  ca

  random-seed 1

  create-turtles 100

  ask turtles [

    ask other turtles [

      if random-float 1 < 0.01 [

        create-link-with myself

      ]

    ]

  ]

  repeat 10 [layout-spring turtles links 0.2 5 1]

  nw:set-context turtles links

end

same applies if you create the network from scratch using the nw extension:

to setup2

  ca

  random-seed 1

  nw:generate-random turtles links 100 0.01

  repeat 10 [layout-spring turtles links 0.2 5 1]

  nw:set-context turtles links

end

however, if you try to load froma graphml file, every time you have the network with a different layout - and this applies with a graphml that I have generated as well as the graphml file used in the nw guide:

to setup3

  ca

  random-seed 1

  nw:load-graphml "random-exact-50-4-106.graphml"

  repeat 10 [layout-spring turtles links 0.2 5 1]

end

to setup4

  ca

  random-seed 1

  nw:load-graphml "prova.graphml"

  repeat 10 [layout-spring turtles links 0.2 5 1]

end

I am attaching a folder with the model example as well as the two graphml files used. Can anyone point me in the right direction? Is this a known problem?

Best,

Simone