Agents.jl: OpenStreetMaps example of zombie outbreak not running

General Usage
1

Hi, currently learning Julia and the Agents.jl library. So far, I’ve managed to reproduce other examples in the package tutorials, so I guess it has nothing to do with versions(?).

The code is taken from Zombie Outbreak in a City · Agents.jl

and the zombie outbreak is throwing the following error (I think at the visualization part? because I can step the model forward, just can’t seem to get the nice plot in the example)

Thanks for any hints as to what might be going on

{
“name”: “LoadError”,
“message”: "MethodError: no method matching agents_space_dimensionality(::Agents.OSM.OpenStreetMapSpace)
The function agents_space_dimensionality exists, but no method is defined for this combination of argument types.

Closest candidates are:
agents_space_dimensionality(::Nothing)
@ AgentsVisualizations ~/.julia/packages/Agents/dTr7O/ext/AgentsVisualizations/src/spaces/nothing.jl:5
agents_space_dimensionality(::AgentBasedModel{Nothing})
@ AgentsVisualizations ~/.julia/packages/Agents/dTr7O/ext/AgentsVisualizations/src/spaces/nothing.jl:3
agents_space_dimensionality(::AgentBasedModel)
@ AgentsVisualizations ~/.julia/packages/Agents/dTr7O/ext/AgentsVisualizations/src/spaces/abstract.jl:1
…
",
“stack”: "MethodError: no method matching agents_space_dimensionality(::Agents.OSM.OpenStreetMapSpace)
The function agents_space_dimensionality exists, but no method is defined for this combination of argument types.

Closest candidates are:
agents_space_dimensionality(::Nothing)
@ AgentsVisualizations ~/.julia/packages/Agents/dTr7O/ext/AgentsVisualizations/src/spaces/nothing.jl:5
agents_space_dimensionality(::AgentBasedModel{Nothing})
@ AgentsVisualizations ~/.julia/packages/Agents/dTr7O/ext/AgentsVisualizations/src/spaces/nothing.jl:3
agents_space_dimensionality(::AgentBasedModel)
@ AgentsVisualizations ~/.julia/packages/Agents/dTr7O/ext/AgentsVisualizations/src/spaces/abstract.jl:1
…

Stacktrace:
[1] agents_space_dimensionality(model::StandardABM{Agents.OSM.OpenStreetMapSpace, Zombie, Dict{Int64, Zombie}, Tuple{DataType}, typeof(zombie_step!), typeof(dummystep), typeof(Agents.Schedulers.fastest), Dict{Symbol, Float64}, MersenneTwister})
@ AgentsVisualizations ~/.julia/packages/Agents/dTr7O/ext/AgentsVisualizations/src/spaces/abstract.jl:1
[2] axistype(model::StandardABM{Agents.OSM.OpenStreetMapSpace, Zombie, Dict{Int64, Zombie}, Tuple{DataType}, typeof(zombie_step!), typeof(dummystep), typeof(Agents.Schedulers.fastest), Dict{Symbol, Float64}, MersenneTwister})
@ AgentsVisualizations ~/.julia/packages/Agents/dTr7O/ext/AgentsVisualizations/src/abmplot.jl:15
[3] abmplot(model::StandardABM{Agents.OSM.OpenStreetMapSpace, Zombie, Dict{Int64, Zombie}, Tuple{DataType}, typeof(zombie_step!), typeof(dummystep), typeof(Agents.Schedulers.fastest), Dict{Symbol, Float64}, MersenneTwister}; figure::@NamedTuple{size::Tuple{Int64, Int64}}, axis::@NamedTuple{title::Observable{String}, titlealign::Symbol}, warn_deprecation::Bool, kwargs::@Kwargs{add_controls::Bool, agent_color::typeof(zombie_color), agent_size::typeof(zombie_size)})
@ AgentsVisualizations ~/.julia/packages/Agents/dTr7O/ext/AgentsVisualizations/src/abmplot.jl:8
[4] abmvideo(file::String, model::StandardABM{Agents.OSM.OpenStreetMapSpace, Zombie, Dict{Int64, Zombie}, Tuple{DataType}, typeof(zombie_step!), typeof(dummystep), typeof(Agents.Schedulers.fastest), Dict{Symbol, Float64}, MersenneTwister}; spf::Nothing, dt::Int64, framerate::Int64, frames::Int64, title::String, showstep::Bool, figure::@NamedTuple{size::Tuple{Int64, Int64}}, axis::@NamedTuple{}, recordkwargs::@NamedTuple{compression::Int64}, kwargs::@Kwargs{agent_color::typeof(zombie_color), agent_size::typeof(zombie_size)})
@ AgentsVisualizations ~/.julia/packages/Agents/dTr7O/ext/AgentsVisualizations/src/convenience.jl:115
[5] top-level scope
@ In[7]:6"
}

2

See:

In particular, I guess you want to:

  • Mention Agents.jl in the post title

  • Enclose code in Markdown code blocks using backticks

3 Likes
3

Thanks. I changed the title. Just to clarify, there is no code in my post. I just pasted the error that the example code in the Agents.jl package throws at me. The actual code is on their official documentation (link above, Zombie outbreak in a city)

1 Like
4

Yes, the error is what I meant by “code”. The goal is to have it readable, and prevent contents being misinterpreted as Markdown syntax and @user mentions.