CODEWITHSUNDEEP
pythonmatplotlibjupyter-notebookipywidgets
Arthur Azevedo De Amorim
Arthur Azevedo De Amorim

Reputation: 23622

How to display matplotlib plots in a Jupyter tab widget?

I am having trouble displaying plots inside of Jupyter tab widgets. Consider the following snippet:

import matplotlib.pyplot as plt
import pandas as pd
import ipywidgets as widgets
import numpy as np

out1 = widgets.Output()
out2 = widgets.Output()
data1 = pd.DataFrame(np.random.normal(size = 50))
data2 = pd.DataFrame(np.random.normal(size = 100))

with out1:
    fig1, axes1 = plt.subplots()
    data1.hist(ax = axes1)
    display(fig1)

with out2:
    fig2, axes2 = plt.subplots()
    data2.hist(ax = axes2)
    display(fig2)

tab = widgets.Tab(children = [out1, out2])
tab.set_title(0, 'First')
tab.set_title(1, 'Second')
display(tab)

(I am running Python 3.5.2, Jupyter 4.4.0, ipywidgets 7.2.1 on Ubuntu 16.04 inside a virtual environment.)

If I put this code on the first row of the notebook and run it, I see a tab widget with two tabs, each one of which displays a string, but not the plot:

No plots

If I run it for a second time, or if I rerun it putting everything after the import of matplotlib in a second cell, I see a tab widget with one plot on each tab, but I get the two plots displayed a second time outside of the tabs.

Too many plots

I can get rid of the additional displays by wrapping my code inside calls to plt.ioff and plt.ion, but it has been suggested to me that this is a hack. And in any case, it does not make matplotlib display the plots in the first cell.

Question: What is the proper way of displaying plots inside tabs?

Upvotes: 24

Views: 24753

Answers (3)

RA Prism
RA Prism

Reputation: 89

plt.show(fig) in the answer above from ac24 is now deprecated:

In [1]: import matplotlib.pyplot as plt                                                                                                                                   

In [2]: fig = plt.figure()                                                                                                                                                

In [3]: plt.show(fig)                                                                                                                                                     
<ipython-input-3-d1fd62acb551>:1: MatplotlibDeprecationWarning: Passing the 
block parameter of show() positionally is deprecated since Matplotlib 3.1; the 
parameter will become keyword-only in 3.3.
    plt.show(fig)

plt.show(block=True) (or plt.show(block=False)) is the keyword-only call.

Upvotes: 0

Captain Nick
Captain Nick

Reputation: 1

from IPython.display import display

Upvotes: -3

ac24
ac24

Reputation: 5565

I added a couple of things to make your code work as you would like

  • Add %matplotlib inline at the top of the cell
  • Replace your display(fig) calls with plt.show(fig) calls.
%matplotlib inline
import matplotlib.pyplot as plt
import pandas as pd
import ipywidgets as widgets
import numpy as np

out1 = widgets.Output()
out2 = widgets.Output()
data1 = pd.DataFrame(np.random.normal(size = 50))
data2 = pd.DataFrame(np.random.normal(size = 100))

tab = widgets.Tab(children = [out1, out2])
tab.set_title(0, 'First')
tab.set_title(1, 'Second')
display(tab)

with out1:
    fig1, axes1 = plt.subplots()
    data1.hist(ax = axes1)
    plt.show(fig1)

with out2:
    fig2, axes2 = plt.subplots()
    data2.hist(ax = axes2)
    plt.show(fig2)

Upvotes: 38

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