Can not display plot with matplotlib under eclipse

Question

I have a strange problem with matplotlib under Eclipse I've tested this code and this works fine in the command line:

import matplotlib.pyplot as plt
import matplotlib.pylab as pylab
plt.plot([1,2,3,4])
plt.ylabel('some numbers')
plt.show()

But when I execute this code under Eclipse, there is nothing shown. I see that pydev understood all my imports and there is no error message.

Answer 1

using Ubuntu 12.04 and i have installed python3.3 This is what worked for me.

You need to have freetype. sudo apt-get install freetype*

You need to have freetype. sudo apt-get install python3.3-dev

You need to have g++. sudo apt-get install g++

You need to have libevent-dev sudo apt-get install libevent-dev

You need to have libpng-dev sudo apt-get install libpng-dev

You need to have libjpeg8-dev sudo apt-get install libjpeg8-dev

You need to have python3.3-tk sudo apt-get install python3.3-tk

You need to have tk-dev sudo apt-get install tk-dev

You need to have python-gtk2-dev sudo apt-get install python-gtk2-dev

Get the tar file from the website and untar it in the dist-packages /usr/local/lib/python3.3/dist-packages/matplotlib-1.3.1. sudo python3.3 setup.py clean (this might be optional) sudo python3.3 setup.py install

NOTE: I had to change the matplotlibrc file in the dist-packages in the mpl-data directory. The backend line was changed from agg to TkAgg and interactive was set to True.

Answer 2

In my case, the Python Interpreters doesn't recognize matplotlib installing. Try to apply Python Interpreters again.

Window -> Preferences -> PyDev -> Interpreters -> Python Interpreters -> Apply -> Select python interpreters -> OK -> Apply and Close.

Hope it works.