Error when plotting in IJulia notebooks

[psilva07]

I have a fresh install of Julia in a Mac and I have been trying to use the plotly library in the IJulia notebooks but it is not working. The issue is similar to https://github.com/Keno/GraphViz.jl/issues/11 but I couldn't find a solution.

I didn't install Jupyter beforehand so I'm using Miniconda. I got the plots working on the REPL with Blink but so far nothing on the notebooks. Here is what I have:

using Plots; plotly()
p = plot(rand(10), c=:red, m=(20,:green))

[Plots.jl] Initializing backend: plotly
MethodError: `_writemime` has no method matching _writemime(::Base.AbstractIOBuffer{Array{UInt8,1}}, ::MIME{symbol("image/svg+xml")}, ::Plots.Plot{Plots.PlotlyBackend})
Closest candidates are:
  _writemime(::IO, ::MIME{symbol("image/svg+xml")}, !Matched::Plots.Plot{Plots.PyPlotBackend})
  _writemime(::IO, !Matched::MIME{symbol("image/png")}, ::Plots.Plot{Plots.PlotlyBackend})
  _writemime(::IO, !Matched::MIME{symbol("text/html")}, ::Plots.Plot{Plots.PlotlyBackend})
  ...

 in writemime at /Users/pedrosilva/.julia/v0.4/Plots/src/output.jl:150
 in writemime at /Users/pedrosilva/.julia/v0.4/Plots/src/output.jl:140
 in writemime at multimedia.jl:43
 in sprint at iostream.jl:206
 in display_dict at /Users/pedrosilva/.julia/v0.4/Plots/src/output.jl:189

[tbreloff]

Hi @psilva07 a couple things:

• This is not a PlotlyJS.jl issue, as confusing as that is (see http://plots.readthedocs.io/en/latest/backends/#plotly-plotlyjs)
• This works for me... maybe do Pkg.checkout("Plots") (or wait 5 minutes for the new version to be merged into METADATA 😉

[psilva07]

Thanks @tbreloff . I did Pkg.checkout("Plots") and used plotlyjs() ranther than plotly() but still no luck:

using Plots; plotlyjs()
p = plot(rand(10), c=:red, m=(20,:green))

[Plots.jl] Initializing backend: plotlyjs
INFO: Recompiling stale cache file /Users/pedrosilva/.julia/lib/v0.4/Blink.ji for module Blink.
Plotly javascript loaded.
LoadError: MethodError: `colon` has no method matching colon(::JSON.State{false})
Closest candidates are:
  colon(::Any, !Matched::Lazy.List)
  colon{T}(::T, !Matched::T)
  colon(::Any, !Matched::Any, !Matched::Lazy.List)
  ...
while loading In[2], in expression starting on line 1

 in _print at /Users/pedrosilva/.julia/v0.4/PlotlyJS/src/json.jl:9
 in _print at /Users/pedrosilva/.julia/v0.4/JSON/src/JSON.jl:136
 in print at /Users/pedrosilva/.julia/v0.4/JSON/src/JSON.jl:204
 in sprint at iostream.jl:206
 in json at /Users/pedrosilva/.julia/v0.4/JSON/src/JSON.jl:217
 in map at tuple.jl:60
 in _call_plotlyjs at /Users/pedrosilva/.julia/v0.4/PlotlyJS/src/displays/ijulia.jl:140
 in addtraces! at /Users/pedrosilva/.julia/v0.4/PlotlyJS/src/displays/ijulia.jl:161
 in addtraces! at /Users/pedrosilva/.julia/v0.4/PlotlyJS/src/display.jl:78
 in _series_added at /Users/pedrosilva/.julia/v0.4/Plots/src/backends/plotlyjs.jl:38
 in _apply_series_recipe at /Users/pedrosilva/.julia/v0.4/Plots/src/plot.jl:204
 in _plot! at /Users/pedrosilva/.julia/v0.4/Plots/src/plot.jl:471

Thanks for pointing me out on the right direction though, I will keep looking.

[tbreloff]

I saw JSON just tagged a new version... I wonder if it broke something in PlotlyJS?

Did you test both plotly() and plotlyjs()? As described in the docs, they're different backends, even though they share a lot of code. And they both work fine for me.

[psilva07]

I'm getting a different error now with plotly() actually:

[Plots.jl] Initializing backend: plotly
WARNING: Couldn't initialize plotly.  (might need to install it?)
LoadError: SystemError: opening file /Users/pedrosilva/.julia/v0.4/Plots/deps/plotly-latest.min.js: No such file or directory
while loading In[3], in expression starting on line 1

[tbreloff]

Pkg.build("Plots")

[psilva07]

Ow yes, I forgot that, newbie mistake. It works with plotly() now. Still does not with plotlyjs(). Thanks a lot. I will post here if I find a solution for the later.

[oschulz]

I can confirm the problem (Ubuntu 14.04, 64-bit, official Julia 0.4.5 build, fresh pkg directory). #48 fixes the issue for me.

[hsseung]

I can confirm that the new version of JSON.jl breaks PlotlyJS. I downgraded to v0.5.1 and it worked again.

[sglyon]

Thank you all for hunting this down. I'll merge #48 today and tag a new release on Metadata.