##MCMC sampling function
MCMCsampleLSM = function(niter,Y,Z,Intercept,dd,MuInt,VarInt,VarZ,Psi,
dof,accZ,accInt,tuneZ,tuneInt,A,B)
{
nn = nrow(Y)
#using MDS of dis-similarity matrix of observed network at time tt
g = graph.adjacency(Y);
ss = shortest.paths(g);
ss[ss > 4] = 4;
Z = cmdscale(ss,k = dd);
##Centering matrix
C = (diag(nn) - (1/nn) * array(1, dim = c(nn,nn)))
##projection matrix
Z00 = C %*% Z
MCMCdraws = MCMCcppLSM(Y,Z,Intercept,nn,dd,niter,tuneInt,tuneZ,accInt,accZ,
MuInt,VarInt,VarZ,A,B)
draws = list(Intercept = MCMCdraws$Intercept,
Z = MCMCdraws$Z, VarZ = MCMCdraws$ZVarFinal,
Likelihood = MCMCdraws$Likelihood)
accInt = MCMCdraws$accInt;
accZ = MCMCdraws$accZ;
accZ = accZ/niter
accInt = accInt/niter
acc = list(accZ=accZ,accInt=accInt)
return(list(draws=draws,acc=acc))
}
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