Re: [igraph] Problems with constraint calculation in igraph python library

[Tamas Nepusz]

Dear Eytan,

> I am using the latest version of igraph for python 2.5 (v0.5) under  
> mac os x 10.5, and the Burt constraint calculation only seems to  
> yield 0's or 1's for each node's constraint, for both synthetic and  
> empirical networks.

Thanks for reporting that, this is definitely a bug. However, it's  
easy to fix. If you are able to recompile the Python interface from  
scratch, you'll only have to search for igraphmodule_Graph_constraint  
in src/graphobject.c and replace the following line at the end of the  
function:

list = igraphmodule_vector_t_to_PyList(&result, IGRAPHMODULE_TYPE_INT);

The correct version is:

list = igraphmodule_vector_t_to_PyList(&result,  
IGRAPHMODULE_TYPE_FLOAT);

If you are not able to re-compile it, just tell me and I'll send you a  
patched version.

Best regards,
--
Tamas