>From the docs at
http://igraph.org/c/doc/igraph-Attributes.html#idm344008595600:
Please note that the attribute handler must be attached before you call any
other igraph functions, otherwise you might end up with graphs without
attributes and an active attribute handler, which might cause unexpected
program behaviour. The rule is that you attach the attribute handler in the
beginning of your main() and never touch it again. (Detaching the attribute
handler might lead to memory leaks.)
Also, consider passing pointers to igraph_t to functions, otherwise you
might get into trouble. The fixed code is below. G.
#include <igraph.h>
void f(igraph_t *g, double number){
igraph_real_t N = number;
SETGAN(g, "number", N);
}
int main(void){
igraph_t g;
float N = 50.0;
igraph_integer_t Kin = 8.0;
igraph_bool_t directed = 1;
igraph_i_set_attribute_table(&igraph_cattribute_table);
igraph_erdos_renyi_game(&g, IGRAPH_ERDOS_RENYI_GNM, N, N*Kin/2.0,
directed, 0);
f(&g, 0.2);
return 0;
}
On Tue, Jan 13, 2015 at 12:09 PM, Daniel Penalva <dka...@gmail.com> wrote:
> that's it:
>
> http://pastebin.com/fAjX2M78
>
> On Tue, Jan 13, 2015 at 2:56 PM, Gábor Csárdi <csardi.ga...@gmail.com>
> wrote:
>
>> Please send complete code that reproduces the error. Thanks. G.
>>
>> On Tue, Jan 13, 2015 at 11:55 AM, Daniel Penalva <dka...@gmail.com>
>> wrote:
>>
>>> i setted igraph_i_set_attribute_table(&igraph_cattribute_table) in the
>>> int main(void)
>>>
>>> On Tue, Jan 13, 2015 at 2:46 PM, Daniel Penalva <dka...@gmail.com>
>>> wrote:
>>>
>>>> Hi
>>>>
>>>> Iam trying to use this interface, but got a error when encapsulated the
>>>> functions inside another, eg:
>>>>
>>>> void f(igraph_t g, double prickles){
>>>> igraph_real_t good = prickles;
>>>> SETGAN(&g, "food", good);
>>>> }
>>>>
>>>> got a error:
>>>>
>>>> vector_ptr.c:258: igraph_vector_ptr_size: Assertion `v != ((void *)0)'
>>>> failed.
>>>>
>>>> any hint ? thank-you
>>>>
>>>> On Mon, Jan 12, 2015 at 2:25 PM, Daniel Penalva <dka...@gmail.com>
>>>> wrote:
>>>>
>>>>> thank you
>>>>>
>>>>> On Mon, Jan 12, 2015 at 7:56 AM, Tamas Nepusz <nta...@gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> > How can i add properties to the nodes of a graph ? Iam using igraph
>>>>>> with C
>>>>>> > language.
>>>>>> Please refer to http://igraph.org/c/doc/igraph-Attributes.html
>>>>>>
>>>>>> > I want to add:
>>>>>> >
>>>>>> > char *
>>>>>> > doubles
>>>>>> > int
>>>>>> >
>>>>>> > and access by the adjacency matrix structure. Is there any doc to
>>>>>> this ?
>>>>>> igraph does not use adjacency matrices to represent a graph. If you
>>>>>> want to
>>>>>> retrieve an attribute corresponding to an edge, you have to query the
>>>>>> ID of the
>>>>>> edge first using igraph_get_eid() and then retrieve the attribute of
>>>>>> interest
>>>>>> using igraph_cattribute_EAN() for numeric attributes,
>>>>>> igraph_cattribute_EAS()
>>>>>> for string attributes, or igraph_cattribute_EAB() for booleans.
>>>>>>
>>>>>> --
>>>>>> T.
>>>>>>
>>>>>> _______________________________________________
>>>>>> igraph-help mailing list
>>>>>> igraph-help@nongnu.org
>>>>>> https://lists.nongnu.org/mailman/listinfo/igraph-help
>>>>>>
>>>>>
>>>>>
>>>>
>>>
>>> _______________________________________________
>>> igraph-help mailing list
>>> igraph-help@nongnu.org
>>> https://lists.nongnu.org/mailman/listinfo/igraph-help
>>>
>>>
>>
>> _______________________________________________
>> igraph-help mailing list
>> igraph-help@nongnu.org
>> https://lists.nongnu.org/mailman/listinfo/igraph-help
>>
>>
>
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