On Wednesday, November 2, 2016 at 11:57:20 AM UTC, Paul Leopardi wrote:
>
>
>
> On Wednesday, 2 November 2016 20:08:20 UTC+11, Dima Pasechnik wrote:
>>
>> I must say I don't know why these libgap.set_global and get_global are
>> needed.
>>
>>>
>>>
> I used them to get my large matrices into libgap as globals. Trying to
> pass them through a text based interface does not work.
>
could you show an example of this?
IMHO you might indeed have a problem if you use libgap.eval(). But you
should not...
The other thought is that you appear to work with Cayley graphs, and for
them you only need to pass one row of the adjacency matrix,
and the group; passing the whole matrix is an overkill.
>
>
> Following is a toy example, starting with a graph lg on 16 vertices.
> sage: lg=c[1].linear_graph_class_list[0]
> sage: mlg=lg.adjacency_matrix()
> sage: libgap.set_global('MLG',mlg)
> sage: MLG=libgap.get_global('MLG')
> sage: type(MLG)
> <type 'sage.libs.gap.element.GapElement_List'>
> sage: libgap.eval('MLG')
> [ [ 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0 ], [ 1, 0, 0, 1, 0, 1,
> 1, 0, 0, 1, 0, 1, 0, 0, 0, 0 ], [ 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0,
> 0, 0 ], [ 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0 ], [ 1, 0, 1, 0,
> 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0 ], [ 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1,
> 0, 1, 0, 0 ], [ 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0 ], [ 0, 0,
> 1, 1, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0 ], [ 0, 0, 0, 0, 1, 1, 1, 1, 0, 0,
> 0, 0, 0, 1, 1, 0 ], [ 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 1 ], [
> 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1 ], [ 0, 1, 0, 1, 0, 1, 0, 0,
> 0, 0, 1, 0, 0, 0, 1, 1 ], [ 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1
> ], [ 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1 ], [ 0, 0, 0, 0, 0, 0,
> 1, 1, 1, 0, 1, 1, 0, 0, 0, 1 ], [ 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,
> 1, 0 ] ]
>
> The actual adjacency matrices that I want to use in my test are 256x256.
>
> sage: c, reclassification, cayley_graph_classes =
> load_boolean_dimension_graph_classifications(8,9)
> sage: lg=c[9].linear_graph_class_list[0]
> sage: mlg=lg.adjacency_matrix()
> sage: mlg.dimensions()
> (256, 256)
> sage: libgap.set_global('MLG',mlg)
> sage: MLG=libgap.get_global('MLG')
> sage: HH=libgap.eval('HH := Graph( G, [1..16], OnPoints, function(x,y)
> return MLG[x][y] = 1; end,true );')
> sage: cg=c[9].cayley_graph_class_list[0]
> sage: mcg=cg.adjacency_matrix()
> sage: mcg.dimensions()
> (256, 256)
> sage: libgap.set_global('MCG',mcg)
> sage: GG=libgap.eval('GG := Graph( G, [1..16], OnPoints, function(x,y)
> return MCG[x][y] = 1; end,true );')
>
>
--
You received this message because you are subscribed to the Google Groups
"sage-support" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at https://groups.google.com/group/sage-support.
For more options, visit https://groups.google.com/d/optout.
