jupyterlab interactive plot

问题

I'm getting into using Jupyterlab from Jupyter notebooks. In notebooks I used to use:

import matplotlib.pyplot as plt
%matplotlib notebook
plt.figure()
x = [1,2,3]
y = [4,5,6]
plt.plot(x,y)

for interactive plots. Which now gives me (in jupyterlab):

JavaScript output is disabled in JupyterLab

I have also tried the magic (with jupyter-matplotlib installed):

%matplotlib ipympl

But that just returns:

FigureCanvasNbAgg()

Inline plots:

%matplotlib inline

work just fine, but I want interactive plots.

回答1:

Complete steps

1. Install nodejs, e.g. conda install nodejs.
2. Install ipympl, e.g. pip install ipympl.
3. [Optional, but recommended; update JupyterLab, e.g.
   pip install --upgrade jupyterlab.]
4. [Optional, but recommended; for a local user installation, run:
   export JUPYTERLAB_DIR="$HOME/.local/share/jupyter/lab".]

5. Install extensions:

   jupyter labextension install @jupyter-widgets/jupyterlab-manager
   jupyter labextension install jupyter-matplotlib
   

6. Enable widgets: jupyter nbextension enable --py widgetsnbextension.

7. Restart JupyterLab.
8. Decorate with %matplotlib widget.

---

Not recommended, but to blindly get the widget extension working in Anaconda, you can run the following in a terminal window:

conda install -y nodejs
pip install ipympl
pip install --upgrade jupyterlab
jupyter labextension install @jupyter-widgets/jupyterlab-manager
jupyter labextension install jupyter-matplotlib
jupyter nbextension enable --py widgetsnbextension

回答2:

To enable the jupyter-matplotlib backend, use the matplotlib Jupyter magic:

%matplotlib widget
import matplotlib.pyplot as plt
plt.figure()
x = [1,2,3]
y = [4,5,6]
plt.plot(x,y)

More info here jupyter-matplotlib on GitHub

回答3:

As per Georgy's suggestion, this was caused by Node.js not being installed.

来源：https://stackoverflow.com/questions/50149562/jupyterlab-interactive-plot