Python matplotlib 未在 Jupyter Notebook 上显示图像
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matplotlib not displaying image on Jupyter Notebook
提问by Usama Khan
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.
我正在使用 ubuntu 14.04 并使用 anaconda2.7 在 jupyter notebook 中编码，其他一切都是最新的。今天我在编码，一切正常。我关闭了笔记本，当我重新打开它时，除了没有显示图像外，一切正常。
%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
这是我正在使用的代码，一个非常简单的代码，但不显示图像
<matplotlib.image.AxesImage at 0xaf7017ac>
this is displayed in the output area please help
这显示在输出区域请帮助
回答by Graham S
You need to tell matplotlib to actually show the image. Add this at the end of your segment:
您需要告诉 matplotlib 实际显示图像。在段的末尾添加：
plt.show()
回答by yann
To show image in Jupyter Notebook by matplotlib, one should use the %matplotlib inlinemagic command and plt.show().
As for your code, adding plt.show()after plt.imshow()expression will make the image shown.
要通过 matplotlib 在 Jupyter Notebook 中显示图像，应使用%matplotlib inline魔术命令和plt.show().
至于您的代码，添加plt.show()afterplt.imshow()表达式将使图像显示。
回答by jmsinusa
If using the inlinebackend, you just need to call plt.show().
如果使用inline后端，您只需要调用plt.show().
If you are using the notebookbackend (%matplotlib notebook), then you should call plt.figure()before plt.imshow(img). This is especially important if you wish to use interactive figures!
如果您正在使用notebook后端 ( %matplotlib notebook)，那么您应该plt.figure()在plt.imshow(img). 如果您希望使用交互式图形，这一点尤其重要！
