matplotlib 未在 Jupyter Notebook 上显示图像

Question

I am using ubuntu 14.04 and coding in jupyter notebook using anaconda2.7 and everything else is up to date . Today I was coding, every thing worked fine. I closed the notebook and when I reopened it, every thing worked fine except that the image was not being displayed.

%matplotlib inline
import numpy as np
import skimage
from skimage import data
from matplotlib import pyplot as plt
%pylab inline

img = data.camera()
plt.imshow(img,cmap='gray')

this is the code i am using, a really simple one but doesn't display the image

<matplotlib.image.AxesImage at 0xaf7017ac>

this is displayed in the output area please help

Answer 1

You need to tell matplotlib to actually show the image. Add this at the end of your segment:

plt.show()

Answer 2

To show image in Jupyter Notebook by matplotlib, one should use the %matplotlib inline magic command and plt.show() .
As for your code, adding plt.show() after plt.imshow() expression will make the image shown.

Answer 3

If using the inline backend, you just need to call plt.show() .

If you are using the notebook backend ( %matplotlib notebook ), then you should call plt.figure() before plt.imshow(img) . This is especially important if you wish to use interactive figures!

Answer 4

将内核从 xpython 更改为原始 python 内核