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Why does graph plotting crop so aggressively, and what is a work-around?

asked 2011-03-21 14:00:06 +0200

Sammy Black gravatar image

updated 2023-01-10 00:01:07 +0200

tmonteil gravatar image

Surely, the Sage community is aware of this bug. For example, there is this ticket, in which the problem is supposed to be fixed. But it's not!

A patch is described: in sage/graphs/ we can add the line(?)


Am I to change this value in order to fix this over-zealous cropping behavior? No matter what I do, in this regard, I still end up with graph vertices partially cut off.

What's the easy work-around? I would like to be able to plot graphics_array objects with several graphs (with their vertices clearly shown!).


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I'm keenly interested in this too, and have been for a while (although I haven't gotten around to trying to figure it out).

niles gravatar imageniles ( 2011-03-21 14:11:38 +0200 )edit

Can you post code that replicates the problem and the Sage version you are using. In 4.6.2 I do: sage: g = Graph({0:{1:'a'}, 1:{2:'b'}, 2:{0:'c'}}); g.plot() --- and I get a nice triangle, no cropping occurs. I tried a bunch of other graphs from the database and they all seem fine too.

benjaminfjones gravatar imagebenjaminfjones ( 2011-03-21 15:08:52 +0200 )edit

Ah.. it's probably because the `axes_pad` doesn't get passed to the graphics array.

benjaminfjones gravatar imagebenjaminfjones ( 2011-03-21 15:16:37 +0200 )edit

@benjaminfjones: I am using 4.5.3. Perhaps it's time for an upgrade. :)

Sammy Black gravatar imageSammy Black ( 2011-03-21 16:57:42 +0200 )edit

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answered 2011-03-21 15:18:39 +0200

benjaminfjones gravatar image

Try this:

sage: g1 = Graph({0:{1:'a'}, 1:{2:'b'}, 2:{0:'c'}})
sage: g2 = Graph({0:{1:'a'}, 1:{2:'b'}, 2:{3:'c'}, 3:{0:'d'}})
sage: G = graphics_array([g1.plot(), g2.plot()])
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Thanks. I wasn't using the keyword `axes_pad` explicitly, but rather trying to hack the `` module. This works.

Sammy Black gravatar imageSammy Black ( 2011-03-21 16:59:31 +0200 )edit

I wish somebody would fix this at Sage Days 29 right now!

William Stein gravatar imageWilliam Stein ( 2011-03-22 01:42:48 +0200 )edit

Michael D. would be a natural person to take a look at this, if he wants to dive into the Sage plotting code. He might glance at #9211 and see what he thinks about it.

Jason Grout gravatar imageJason Grout ( 2011-03-22 22:37:10 +0200 )edit

answered 2011-03-21 16:54:21 +0200

Jason Grout gravatar image

updated 2011-03-21 16:55:19 +0200

See #9211, where a better explanation of the cropping problem and a rough patch are waiting for cleanup and review (from 9 months ago!)

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For the record, this bug is fixed since sage-4.8

tmonteil gravatar imagetmonteil ( 2013-06-03 11:14:35 +0200 )edit

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Asked: 2011-03-21 14:00:06 +0200

Seen: 1,079 times

Last updated: Mar 21 '11