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open-connectome-classes / StatConn-Spring-2015-Info

introductory material
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SBM #132

Open DSP137 opened 9 years ago

DSP137 commented 9 years ago

I was re-reading the stochastic blockmodel section (3.8) in Goldenberg et al. and they walk through the two sets of parameters required for an SBM. In their terminology, they state "the blockmodel itself, B, is a K\times K matrix, in which the B(g,h) entry specifies, for instance, the average probability that nodes in block g have connections directed to nodes in block h..."

As far as I know, this is the definition we have been using; however, I was curious about the 'for instance' part of that statement. What are other SBM formats? What are some of the possible things B and \rho can represent?

edunnwe1 commented 9 years ago

I can't seem to find another definition of B in the SBM, and none come to me intuitively either. I wonder if this paper meant 'for instance' to refer to the specific block B(g,h) as an instance of the whole block structure, where there are many blocks.