R Under development (unstable) (2024-02-17 r85935 ucrt) -- "Unsuffered Consequences"
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> 
> 
> library(spatPomp)
Loading required package: pomp
> set.seed(1)
> 
> ## a default measles model with fixed shared initial value parameters (IVPs)
> ## compiled into the object
> 
> m_U <- 2 
> m_model <- measles(U=m_U)
> 
> range(time(m_model))
[1] 1950 1965
> 
> m <- window(m_model,1950,1955)
> 
> m_params <- c(R0=56.8,amplitude=0.554,gamma=30.4,sigma=28.9,mu=0.02,sigmaSE=0.02,rho=0.488,psi=0.116,g=100,alpha=1,iota=0,cohort=0.1)
> 
> m_pf <- pfilter(m_model,Np=20,params=m_params)
> logLik(m_pf)
[1] -85104.57
> 
> ## setting IVPs
> 
> m2_model <- measles(U=m_U,fixed_ivps=FALSE)
> m2_model <- window(m2_model,1950,1955)
> 
> m2_shared_params <- c(R0=56.8,amplitude=0.554,gamma=30.4,sigma=28.9,mu=0.02,sigmaSE=0.02,rho=0.488,psi=0.116,g=100,alpha=1,iota=0,cohort=0.1)
> m2_unit_ivp_names <- c('S','E','I')
> m2_statenames <- paste0(rep(m2_unit_ivp_names,each=m_U),1:m_U)
> m2_ivp_names <- paste0(m2_statenames,"_0")
> m2_ivps <- rep(c(0.032,0.00005,0.00004),each=m_U)
> names(m2_ivps) <- m2_ivp_names
> m2_params <- c(m2_shared_params,m2_ivps)
> 
> set.seed(1)
> m2_pf <- pfilter(m2_model,Np=20,params=m2_params)
> logLik(m2_pf)
[1] -46672.26
> 
> ##
> ## Note: the measles skeleton is correct only when there is no cohort effect,
> ## i.e., cohort=0.
> ##
> 
> ## A call to igirf using the moment-based guide function can test compiled code for eunit_measure, munit_measure, vunit_measure, dunit_measure, runit_measure, rprocess, skeleton, rinit and partrans. 
> 
> m3_params <- m_params
> m3_params["cohort"] <- 0
> m3_igirf_lookahead <- 1
> m3_igirf_ninter <- 2
> m3_igirf_np <- 5
> m3_igirf_nguide <- 5
> m3_igirf_ngirf <- 2
> 
> m3_igirf_out <- igirf(m_model, Ngirf = m3_igirf_ngirf,
+   params=m3_params,
+   rw.sd=rw_sd(g=0.02),
+   cooling.type = "geometric",
+   cooling.fraction.50 = 0.5,
+   Np=m3_igirf_np,
+   Ninter = m3_igirf_ninter,
+   lookahead = m3_igirf_lookahead,
+   Nguide = m3_igirf_nguide,
+   kind = 'moment',
+   verbose = FALSE
+ )
Warning messages:
1: in 'table_lookup': extrapolating at 1.965000e+03. 
2: in 'table_lookup': extrapolating at 1.965002e+03. 
> logLik(m3_igirf_out)
[1] -86380.55
> 
> ## --------------------------------------------------------------------
> ## using measles to test spatPomp() covariate replacement functionality
> ## ____________________________________________________________________
> 
> m_covrep <- spatPomp(m,
+   covar=spatPomp::measlesUK[
+     measlesUK$city %in% m@unit_names,
+     c("year","city","pop","births")]
+ )
> for(slt in slotNames(m)) if(!identical(slot(m,slt),slot(m_covrep,slt))) print(slt)
[1] "unit_covarnames"
[1] "covar"
> ## covariates are not the same since this replacement does not deal with
> ## birth delay
> 
> proc.time()
   user  system elapsed 
   3.39    0.14   10.56