I have downloaded the Umacs (Universal Markov chain sampler) and submitted the following sample code from Kerman and Gelman.
 
s <-Sampler(
J=8,
sigma.y  =c(15,10,16,11,9,11,10,18),
          y  =c(28, 8,-3,7,-1,1,18,12),
     theta =Gibbs(theta.update,theta.init),
          V =Gibbs(V.update,mu.init),
        mu =Gibbs(mu.update,mu.init),
        tau =Gibbs(tau.update,tau.init),
       Trace("theta[1]")
)
 
Error: could not find function "Sampler"
 
Is there anything else I need to download.
 
Thanks,
 
 
Jim L.
  
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