Interact + PyPlot does not work in Jupyter

[Datseris]

MWE:

using PyPlot, Interact
@manipulate for n in slider(100:100:10000; value = 100, label = "n")
   plot(rand(n))
end

This does not update/create a new plot when moving the slider.

[AshtonSBradley]

one solution:

using PyPlot, Interact
f1=figure(figsize=(6,3))
@manipulate for n in slider(100:100:10000; value = 100, label = "n")
   withfig(f1,clear=true) do
        plot(rand(n))
    end
end

[Datseris]

There is another problem, so I keep this open. Let:

using Interact, PyPlot

f1=figure(figsize=(6,3))
line, = plot(1:5, rand(5))
@manipulate for n in slider(100:100:10000; value = 100, label = "n")
   line[:set_data](1:n, rand(n))
end

so even though I change the data of the line, the figure is not updated

[piever]

The

using PyPlot, Interact
f1=figure(figsize=(6,3))
@manipulate for n in slider(100:100:10000; value = 100, label = "n")
   withfig(f1,clear=true) do
        plot(rand(n))
    end
end

works but flickers a lot, so I'm afraid it's not usable in practice. Does anybody know how to get this sort of PyPlot animation to work smoothly in the notebook? Say a for loop that would update a plot in place to create an animation?

[ziotom78]

…works but flickers a lot.

Does it? In my case it just shows this output:

(Scrolling down to the end of the output reveals no plot.)

[twavv]

Re: the withfig example

@piever What do you mean when you say it flickers? It's fine for me™ (at least using the webio-retool branch of WebIO) though theres a certain amount of lag if you drag the slider (as we're plotting all the intermediate things and it has to "catch up").

Using [email protected] doesn't display anything for me though.

[piever]

On InteractBase master you can use onchange to avoid the intermediate steps and only update when slider is released, but even with:

using PyPlot, Interact
f1=figure(figsize=(6,3))
wdg = slider(100:100:10000; value = 100, label = "n")
@manipulate for n in Interact.onchange(wdg)
   withfig(f1,clear=true) do
        plot(rand(n))
    end
end

Sometimes before being redisplayed the plot goes white and gives the overall impression is of a flicker (I'm on webio-retool).

[twavv]

Are you still having these issues? WebIO#master works for me.

[AshtonSBradley]

checking on MacOS with WebIO#master, I still regularly see a flicker on update as reported by @piever , using WebIO#master

testing on WebIO#webio-retool, I get no updates at all, just the initial figure is shown.

just testing in regular notebook, with

Julia Version 1.0.3
Commit 099e826241 (2018-12-18 01:34 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin14.5.0)
  CPU: Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-6.0.0 (ORCJIT, skylake)
Environment:
  JULIA_NUM_THREADS = 8