Actually, what I mean is how to generate the topology of the graph like that picture but not the shape or label of the nodes. The position of top and bottom node is fixed and the others are placed layer by layer. I tried to use sfdp and fruchterman layout to draw, but none of them is satisfied. Is that mean I must write an algorithm to generate the layout by my own?

在 2014年3月19日星期三UTC+8下午5时51分41秒，Tiago Peixoto写道：

On 03/17/2014 02:57 PM, Caspar Yim wrote:
> Hi,
>
> I'm doing some research on concept lattice. And I want to implement the program with graph_tool. Can I use graph_tool API to draw a lattice-like graph similar to the picture below?
>
> <https://lh5.googleusercontent.com/-rBOFzP4TlMc/Uyb_MfVxqKI/AAAAAAAABfU/36SHU4aUj8k/s1600/2014-03-17-215714_808x386_scrot.png>
>

Please take a look at the documentation for the graph_draw()
function. You are freely allowed to select node shapes and text
labels. Currently, however, the choice of node shapes is somewhat
limited. You can't, for instance, select a node shape which is
rectangular, i.e. with different height and width.

Best,
Tiago

--
Tiago de Paula Peixoto <ti...@skewed.de>