[Rsiena-help] Interaction effect specification for bipartite networks

[Ruth M. Ripley]

Dear Marco,

Sorry, I think the information I have coded in the package is incorrect. I
think the egoX should be an 'ego' effect not a 'dyadic': if you change
this in your effects object it should be OK.

I will fix it in the package but it will be a couple of days before it is
available in the binary on R-forge.

Regards,

Ruth
--
Ruth M. Ripley,                         Email:ruth at stats.ox.ac.uk
Dept. of Statistics,                    http://www.stats.ox.ac.uk/~ruth/
University of Oxford,                   Tel:   01865 282851
1 South Parks Road, Oxford OX1 3TG, UK  Fax:   01865 272595


On Tue, 16 Mar 2010, marco tonellato wrote:

> Dear All,
>
> I'm currently modeling a bipartite network of 83 x 577 nodes with RSiena
> (revision 0.61). I was able to estimate significant and convergent
> parameters for the endogenous part and the main effects of 5 attributes
> (related to either node set).
>
> I now have a problem including interaction effects. In particular I would
> like to include the interaction of a constant binary covariate (which
> captures whether or not my nodes of the first mode have tenure) with the
> outdegree activity.
>
> Both using the tcl/tk initerface and entering (also with RSienaTest r62):
>
> myeff<-includeInteraction(myeff,egoX,outActSqrt,interaction1="dev.ten",include=TRUE)
>
> R returned this error message:
>
> invalid interaction specification:"must be at least one ego or both dyadic
> effects".
>
> Finally, I also noticed that the "interactionType"  attribute of the tenure
> egoX effect is set as dyadic, whereas it is left unspecified for all the
> altX effects related to the other attributes I measured for the nodes of the
> second mode.
>
> Am I doing something wrong? What should I do to get the interaction effects
> working?
> Thanks a lot,
>
> Marco
>