torrho's profile - activity

I have no idea why I didn't think of that. I was going nuts over this. Thanks!

First, you can install it by typing:

$ sage -i qhull

Then, i do not think that there in an interface with qhull inside Sage. So, you have to use it from a shell, as if you installed it on your OS:

$ sage -sh

To get help and examples, just type:

(sage-sh) user@machine:~$ qhull

And then, you can try one of the examples:

(sage-sh) user@machine:~$ rbox y 1000 W0 | qhull

Convex hull of 1004 points in 3-d:

  Number of vertices: 4
  Number of facets: 4

Statistics for: rbox y 1000 W0 | qhull

  Number of points processed: 4
  Number of hyperplanes created: 5
  Number of distance tests for qhull: 11001
  CPU seconds to compute hull (after input):  0

To get informations about rbox, just type:

(sage-sh) user@machine:~$ rbox

EDIT : qhull is shipped with scipy (and also with matplotlib from version 1.4), so you could benefit from their Cython interface to use qhull features within Sage (Delaunay triangulation, Voronoi tesselation, convex hull), see this page.

@Rolandb Do you have ArcSDE's C API library?

have you tried the following:

1) 2) f

1. download the pysde-master.zip from github

2. in command line change directory to the download folder

   cd /path/to/download/folder

3. in command line unzip the file

   unzip pysde-master.zip

4. in command line run the following

   /path/to/sage/folder/sage/local/bin/python pysde-master/python/setup.py install

hopefully this helps!

Has anyone used the qhull optional package? I'm not so sure on how to use it. Is there a tutorial on this?

Hello,

It seems that I am only able to create rectilinear graphs in sage. e.g. $K_{13}$ in two concentric circles:

g = graphs.CompleteGraph(13)
_circle_embedding(g,[0,1,2,3,4,5,6],center=(0,0),radius=6,shift=0)
_circle_embedding(g,[7,8,9,10,11,12],center=(0,0),radius=12,shift=0)
g.show()

I'd like to add an image of what this code produces, but I don't have enough karma.

I want my edges to have curves; something like this Paley Graph.

Any ideas on how to do this?