What to do when Japanese is not displayed on matplotlib

Environmental setting

Follow the steps below to set up a machine learning environment. http://qiita.com/mix_dvd/items/29dfb8d47a596b4df36d

Obtaining and executing sample code

Let's test to display the graph using the data of PyData.Okinawa. https://github.com/PyDataOkinawa/meetup001/blob/master/PyData.Okinawa%20Meetup%20001%20opendata%20sample.ipynb

$ git clone https://github.com/PyDataOkinawa/meetup001.git

Launch the Jupyter Notebook, open the notebook named "PyData.Okinawa Meetup 001 opendata sample.ipynb" and run the kernel "Restart & Run all".

Looking at the graph displayed at the bottom, the Japanese part is "□".

Unknown.png

Font settings

Download the font from IPA and install it for matplotlib to improve the above situation.

You can download it from the following page. If you cannot download with the command, please download with a browser. http://ipafont.ipa.go.jp/old/ipafont/download.html

Ubuntu

$ sudo apt install unzip
$ wget -O ipafont.zip http://ipafont.ipa.go.jp/old/ipafont/IPAfont00303.php
$ unzip ipafont.zip
$ mv IPAfont00303/*.ttf .pyenv/versions/anaconda2-4.0.0/lib/python2.7/site-packages/matplotlib/mpl-data/fonts/ttf/
$ rm .cache/matplotlib/fontList.cache

Mac

First, check the location to clear the font cache. Check the location of the font cache with the following code.

python


import matplotlib
from matplotlib import rc
print(matplotlib.get_cachedir())

In my case, it was "/Users/[username]/.matplotlib".

$ cd
$ curl -o ipafont.zip http://ipafont.ipa.go.jp/old/ipafont/IPAfont00303.php
$ unzip ipafont.zip
$ mv IPAfont00303/*.ttf .pyenv/versions/anaconda2-4.0.0/lib/python2.7/site-packages/matplotlib/mpl-data/fonts/ttf/
$ rm .matplotlib/*.cache

Script modification

Change the following parts.

Change before


font = {'family':'Osaka'}
rc('font', **font)

After change


font = {'family':'IPAGothic'}
rc('font', **font)

By the way, if you do not put the following code somewhere, an error will occur, so it is recommended to put it before the above code.

python


from matplotlib import pyplot

Re-execute

Japanese was displayed safely.

Unknown2.png

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