[igraph] Problem with displaying vertex's label text in Chinese characters

[Scott Hale]

This is most likely a font problem. The default font igraph is using to draw the text labels does not have the characters present. I'm not sure how to switch the font for raster images (png, etc.), but it is easy to work around for SVG.

For example, 

#!/usr/bin/env python

# -*- coding: utf-8 -*-

import igraph

g = igraph.Graph()

g.add_vertices(3)

g.vs[0]["label"]="母"

g.vs[1]["label"]="私"

g.vs[2]["label"]="ABC"

g.add_edge(0,1)

g.add_edge(1,2)

g.add_edge(2,1)

layout = g.layout("circle")

g.write_svg("tmp.svg", layout = layout)

generates a file called tmp.svg. Opening this in any standard text editor (e.g. gedit) it is simple to find and replace all instances of the default font for another font that supports Chinese characters. In my installation I had to search for "font-family:Sans" and replace "Sans" with another font.

Cheers,

Scott

On Mon, May 5, 2014 at 5:01 PM, <address@hidden> wrote:

------------------------------

Message: 9
Date: Mon, 5 May 2014 21:35:19 +0800
From: =?us-ascii?B?s8K5+sG6?= <address@hidden>
To: igraph-help <address@hidden>
Subject: [igraph] Problem with displaying vertex's label text in
        Chinese characters
Message-ID: <address@hidden>
Content-Type: text/plain; charset="us-ascii"

Dear,
        I use python-igraph-0.7 on Ubuntu to draw graph.  To display the vertex's text, I add its label attribute . As the text are Chinese characters of 'unicode' type (not 'str' type),  I encode them by "UTF-8". But when the graph is shown, the Chinese characters are show as the small squares, unreadable codes. What's wrong with this?thanks very much.
      Best Wishes!
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