Font size for edge label
Simple example:
d = DiGraph()
d.add_edge(1, 2, '$a_0$')
d.plot(edge_labels=True)
gives me extremely small edge label 'a0', is it possible to increase font size for all edge labels?
Simple example:
d = DiGraph()
d.add_edge(1, 2, '$a_0$')
d.plot(edge_labels=True)
gives me extremely small edge label 'a0', is it possible to increase font size for all edge labels?
This one took me some time. It can be achieved by opening YOUR_SAGE_DIR/local/lib/python2.6/site-packages/sage/graphs/graph_plot.py
and changing the line
self._plot_components['edge_labels'].append(text(str(edges_to_draw[(a,b)][0][0]),[(self._pos[a][0]+self._pos[b][0])/2., (self._pos[a][1]+self._pos[b][1])/2.]))
to
self._plot_components['edge_labels'].append(text(str(edges_to_draw[(a,b)][0][0]),[(self._pos[a][0]+self._pos[b][0])/2., (self._pos[a][1]+self._pos[b][1])/2.],fontsize=20))
There is no need to compile anything, just save the file and then run sage.
Remark: in the mentioned file there are 5 lines starting with
self._plot_components['edge_labels'].append(text...
so to be on the safe side you can change all of them (adding fontsize=20
as a last parameter to the text
function). I suspect they handle different situations (directed/undirected graphs, etc.). You can put DEFAULT_FONTSIZE = 20
at the beginning of the file and then add fontsize=DEFAULT_FONTSIZE
to the text functions - this will allow you to change the size easily later.
yep -- the trac server (trac.sagemath.org) lets you select whether the issue you're reporting is a bug or an enhancement.
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Asked: 2011-07-17 09:44:41 +0100
Seen: 1,051 times
Last updated: Jul 25 '11