PYTHON+NLTK Natural Language learning process three: How to display Chinese in a picture in Nltk/matplotlib

We start by loading our own text files and counting the top -ranked character frequencies

If __name__== "__main__":

corpus_root= '/home/zhf/word '

Wordlists=plaintextcorpusreader (Corpus_root, '. * ')

For W in Wordlists.words ():

Print (W)

Fdist=freqdist (Wordlists.words ())

Fdist.plot (20,cumulative=true)

The text reads as follows:

The RRC setup success rate dropped

Erab Setup Success rate dropped

Prach issue

Customer Feedback

The displayed picture is as follows, where Chinese characters display garbled characters.

The reason for this is that the plt in nltk is actually called the plot in the matplotlib . And in the ubuntun ,

Matplotlib reads the configuration from the configuration file MATPLOTLIBRC , and the font-related content is in it. matplotlib Find the configuration file in the following four locations in turn:

2. The MATPLOTLIBRCunder the current working directory.
4. $MATPLOTLIBRC/MATPLOTLIBRC.
6. MATPLOTLIBRCUnder the user's home directory. such as Linux generally in ~/.config/matplotlib/matplotlibrc, macOS in ~/.MATPLOTLIB/MATPLOTLIBRC .
8. INSTALL/MATPLOTLIB/MPL-DATA/MATPLOTLIBRC, where install refers to the specific installation directory.

Let's look at where the matplotlib configuration file is placed. There are two ways to query

Method One: You can query the configuration file and the currently used font mode. You can see that the font used is/dejavusans.ttf, this file is not in Chinese.

From Matplotlib.font_manager import Findfont, fontproperties

If __name__== "__main__":

Print (Matplotlib.get_configdir ())

Print (Findfont (Fontproperties (Family=fontproperties (). get_family ()))

/home/zhf/.config/matplotlib

/usr/local/lib/python3.6/dist-packages/matplotlib/mpl-data/fonts/ttf/dejavusans.ttf

Method Two: Can detect the python2.7 and python3.6 individual Paths

[Email protected]:/home/zhf/ Desktop # locate-b \mpl-data

/usr/local/lib/python2.7/dist-packages/matplotlib/mpl-data

/usr/local/lib/python3.6/dist-packages/matplotlib/mpl-data

Under mpl-data to enter the font/ttf folder can see all the font way, if you need to use the Chinese language simhei.ttf file . Can see no this file

Available through Fc-list | The grep simhei command checks to see if a simhei.ttf file is installed under the current system . If you have a word document installed, you should have it all. If not, you need to go online to download a

[Email protected]:/home/zhf# fc-list | grep Simhei

/usr/share/fonts/wps-office/simhei.ttf: blackbody , Simhei:style=regular,normal,oby?ejné,standard, Κανονικ? , Normaali,normál,normale,standaard,normalny, обычный , Normálne,navadno,arrunta

Copy this file to

Under the/usr/local/lib/python3.6/dist-packages/matplotlib/mpl-data/font/ttf folder

The Mpl-data directory has matplotlib configuration file matplotlibrc. Go to edit and set Simhei to the first and highest priority in Font.sans-serif .

Clearing the cache in matplotlib

[Email protected]:/home/zhf/ Desktop # cd ~/.cache/matplotlib

[Email protected]:~/.cache/matplotlib# RM ' *. * '

Run now to see normal Chinese display

If you just want to use the individual files in Chinese, you can do the following without modifying the MATPLOTLIBRC configuration file. You can also display Chinese in a single call

matplotlib.rcparams[' font.sans-serif '] = ' Simhei '

x=[1,2,3]

y=[4,5,6]

Plt.plot (x, y)

Plt.title (' test ')

Plt.xlabel (' x- axis ')

Plt.ylabel (' Y axis ')

Plt.grid (True)

Plt.show ()

PYTHON+NLTK Natural Language learning process three: How to display Chinese in a picture in Nltk/matplotlib