Jupyter (IPython) notebook not plotting - python

I installed anaconda to use pandas and scipy. I reading and watching pandas tutorials and they all say to open the ipython notebook using
ipython notebook --pylab==inline
but when I do that I get a message saying
"Support for specifying --pylab on the command line has been removed. Please use '%pylab = inline' or '%matplotlib =inline' in the notebook itself"
But that does not work. Then when I try "plot(arange(10))" I get a message saying "name 'plot' is not defined." I trying plotting data from a .csv file and got
"matplotlib.axes._subplots.AxesSubplot at 0xebf8b70".
What should I do?

I believe the pylab magic was removed when they transitioned from IPython to a more general Jupyter notebook.
Try:
%matplotlib inline
Also when you get a message like:
"matplotlib.axes._subplots.AxesSubplot at 0xebf8b70".
That's just IPython displaying the object. You need to specify IPython display it. Hence the matplotlib inline magic.

Related

Pycharm Jupyter Interactive Matplotlib

Interactive matplotlib plotting is already a thing, but does not work properly in Pycharm, when used within a jupyter notebook.
The %matplotlib notebook does not work (throws no error, but I get <IPython ... JavaScript object> instead of a plot. If I plot normally (also with or without plt.show()) I just get a png and cannot interact in any way (even if, e.g., sliders are visible).
I couldn't find any answers elsewhere to this exact problem. It might be working in the browser version of jupyter, but I would like to stick to using PyCharm.
Pycharm v 2017.3 Community Edition
You can try:
import matplotlib
matplotlib.use('Qt5Agg')
import matplotlib.pyplot as plt
Instead of importing only the peplos.
It's a trick I found on forum of Jetbrains
https://intellij-support.jetbrains.com/hc/en-us/community/posts/115000736584-SciView-in-PyCharm-2017-3-reduces-functionality-of-Matplotlib It works for me. With this, you skip actually the Sciview and plot in a normal matplotlib window

%matplotlib inline versus %matplotlib notebook display problems in pythonAnywhere jupyter

This is not a duplicate as suggested. I am not trying to switch backends. I am just trying to use the %matplotlib notebook formulation. Moreover, the solutions suggested in that other question (place the%matplotlib notebook before the the from matplotlib import pylplot as plt OR trying call the magic command twice in a row) do not work for me. The behavior (blank notebook charts) remains.
place the%matplotlib notebook before the the from matplotlib import pylplot as plt OR trying call the magic command twice in a row
When I use %matplotlib inline my charts always show, but they're generally on the small side, and have no ability to zoom/pan.
When I use %matplotlib notebook I get zoomable, pannable charts, but I sometimes encounter problems where the charts display as blank.
Background:
PythonAnywhere notebook 3.6 Python. Using update Google Chrome from Windows 7.
If I reopen my existing notebook, even restart the kernel and re-run all the cells, all my .plot() appear blank. But if I contemporaneously start a brand new 3.6 notebook, %matplotlib notebook plots work fine. Killing all the jupyter-related processes doesn't help either.
This does not always occur. But if one chart appears blank, they all appear blank.
I would like to use the notebook magic, but this problem is pretty profound.
I have found some stability on using %matplotlib notebook, after including plt.close(), before all my plots.
A pretty dirty solution, I know, but it's working. Here Windows 10, Python 3.6.2 and Jupyter 6.03 (updated Jupyter haven't solved the issue).
Hope this helps.
%matplotlib qt will do your job.

%matplotlib inline doesn't work on iPython and Jupyter console

I'm trying out Jupyter console for the first time, but can't get the %matplotlib inline magic to work. Below is a screenshot of an example session:
The plot shows in a separate window after I run Line 6, and Line 7 doesn't do anything.
When I run %matplotlib --list, inline is given as one of the options:
Available matplotlib backends: ['osx', 'qt4', 'qt5', 'gtk3', 'notebook', 'wx', 'qt',
'nbagg', 'agg', 'gtk', 'tk', 'ipympl', 'inline']
When I try to use another backend, say qt5, it gives an error message because I don't have any Qt installed.
ImportError: Matplotlib qt-based backends require an external PyQt4, PyQt5, or PySide
package to be installed, but it was not found.
Running %matplotlib?? reads:
If you are using the inline matplotlib backend in the IPython Notebook
you can set which figure formats are enabled using the following::
In [1]: from IPython.display import set_matplotlib_formats
In [2]: set_matplotlib_formats('pdf', 'svg')
The default for inline figures sets `bbox_inches` to 'tight'. This can
cause discrepancies between the displayed image and the identical
image created using `savefig`. This behavior can be disabled using the
`%config` magic::
In [3]: %config InlineBackend.print_figure_kwargs = {'bbox_inches':None}
But I don't know if it's something I can tweak around to solve my issue.
When I try it the magic IPython console, it says inline is an Unknown Backend.
UnknownBackend: No event loop integration for u'inline'. Supported event loops are: qt,
qt4, qt5, gtk, gtk2, gtk3, tk, wx, pyglet, glut, osx
I've also found this issue on github after some googling but I don't even know if it's relevant to my situation (most of their conversation didn't make sense to me lol).
Lastly, I'm not sure if this issue is related at all, but here it is, just in case: when I try to open Vim in Jupyter via the !vim command, it glitches pretty badly, preventing me from even exiting out of Jupyter itself without closing the terminal altogther. Vim works perfectly fine when called inside IPython console, however.
I'm using matplotlib 2.0.0.
If anyone could help me figure this out, that'd be great! Thank you!
You’re running a console which is completely text based and incapable of showing images. Therefore, although inline is available, it's not producing inline output.
I'm not sure why it doesn't throw an error, though, which it does in my case:
You can use %matplotlib inline in a GUI console, like Jupyter QTConsole
or in a jupyter notebook in the browser
%matplotlib without the inline works for me (I'm using osx and IPython 7.0.1)
If you're running an old version of ipython try %pylab inline instead. See notes in this tutorial

matplotlib inline syntax error

I'm testing a python program, which contains calling for IPython. But I got errors in the following code:
If I use
%matplotlib inline
I got a syntax error at the "%" symbol.
I found a solution to this problem using:
from IPython import get_ipython
get_ipython().run_line_magic('matplotlib', 'inline')
I got error saying:
AttributeError: 'NoneType' object has no attribute 'run_line_magic'
I'm using Ubuntu 16.04 and running the code via command line. How can I fix this ?
This %matplotlib magic is used to display graphs (of matplotlib.pyplot objects). This needs UI to display. So cannot be display on command prompt.
According to IPython documentation,
If the %matplotlib magic is called without an argument, the output of a plotting command is displayed using the default matplotlib backend in a separate window. Alternatively, the backend can be explicitly requested using, for example:
%matplotlib gtk
A particularly interesting backend, provided by IPython, is the inline backend. This is available only for the Jupyter Notebook and the Jupyter QtConsole. It can be invoked as follows:
%matplotlib inline
Simple solution would be to replace %matplotlib inline with %matplotlib and run it using ipython.
Alternatively, what you could do is download jupyter notebook and run that code there.
Or as #tihom said in comments, you could comment or remove that line and run the code but this wouldn't display the graphs and other things.
You can use pylab mode in ipython. Simply run ipython --pylab in the terminal. That will launch ipython configured to be able to support the matplotlib GUI backend

including plots in an IPython Notebook without %matplotlib magic function

Setup:
I have an IPython Notebook I’d like to include in the tutorials section of my docs. I’ve written a .ipynb —> .rst conversion script (using pandoc) that works as follows: the notebook is first converted to a .py file, which is executed as a script, and if the script execution raises no exceptions, an .rst export is triggered and a link to that tutorial is built in the appropriate spot of the docs. That way, the tutorials can be integrated into my docs only under the condition that the code does what the tutorial says it does. This method was developed as a result of the following question: Raise exception if script fails
Ok, so here is the problem. I’d like for some of the .ipynb tutorials to include in-line plots with matplotlib. The way I display plots in an IPython Notebook is using the magic function call:
%matplotlib inline
However, if this command appears in a python executable script, python raises an exception. So none of my tutorials can currently include plots.
Question:
So my question is this: how can I include in-line plots in a Notebook in a way that will not raise an exception when the notebook is exported to a .py file and executed as a script? Or, short of that, any suggestions for another workaround?
Use this instead:
from IPython import get_ipython
ipython = get_ipython()
if ipython:
ipython.magic("matplotlib inline")
Currently, there should be no real need to use %matplotlib inline magic in jupyter. Instead, this should display nicely:
import matplotlib.pyplot as plt
fig, ax = plt.subplot(111)
ax.plot([3,4,2,5])
fig

Categories