troubleshooting.R
In glmmTMB: Generalized Linear Mixed Models using Template Model Builder

params <-
list(EVAL = FALSE)

## ----load_lib,echo=FALSE------------------------------------------------------
library(glmmTMB)
knitr::opts_chunk$set(eval = if (isTRUE(exists("params"))) params$EVAL else FALSE)

## ----non-pos-def,cache=TRUE, warning=FALSE------------------------------------
#  zinbm0 = glmmTMB(count~spp + (1|site), zi=~spp, Salamanders, family=nbinom2)

## ----fixef_zinbm0-------------------------------------------------------------
#  fixef(zinbm0)

## ----f_zi2--------------------------------------------------------------------
#  ff <- fixef(zinbm0)$zi
#  round(plogis(c(sppGP=unname(ff[1]),ff[-1]+ff[1])),3)

## ----salfit2,cache=TRUE-------------------------------------------------------
#  Salamanders <- transform(Salamanders, GP=as.numeric(spp=="GP"))
#  zinbm0_A = update(zinbm0, ziformula=~GP)

## ----salfit2_coef,cache=TRUE--------------------------------------------------
#  fixef(zinbm0_A)[["zi"]]

## ----salfit3,cache=TRUE-------------------------------------------------------
#  zinbm0_B = update(zinbm0, ziformula=~(1|spp))
#  fixef(zinbm0_B)[["zi"]]
#  VarCorr(zinbm0_B)

## ----zinbm1,cache=TRUE--------------------------------------------------------
#  zinbm1 = glmmTMB(count~spp + (1|site), zi=~mined, Salamanders, family=nbinom2)
#  fixef(zinbm1)[["zi"]]

## ----zinbm1_confint,cache=TRUE------------------------------------------------
#  ## at present we need to specify the parameter by number; for
#  ##  extreme cases need to specify the parameter range
#  ## (not sure why the upper bound needs to be so high ... ?)
#  cc = confint(zinbm1,method="uniroot",parm=9, parm.range=c(-20,20))
#  print(cc)

## ----fatfiberglmm-------------------------------------------------------------
#  ## data taken from gamlss.data:plasma, originally
#  ## http://biostat.mc.vanderbilt.edu/wiki/pub/Main/DataSets/plasma.html
#  gt_load("vignette_data/plasma.rda")
#  m4.1 <- glm(calories ~ fat*fiber, family = Gamma(link = "log"), data = plasma)
#  m4.2 <- glmmTMB(calories ~ fat*fiber, family = Gamma(link = "log"), data = plasma)
#  ps  <- transform(plasma,fat=scale(fat,center=FALSE),fiber=scale(fiber,center=FALSE))
#  m4.3 <- update(m4.2, data=ps)
#  ## scaling factor for back-transforming standard deviations
#  ss <- c(1,
#          fatsc <- 1/attr(ps$fat,"scaled:scale"),
#          fibsc <- 1/attr(ps$fiber,"scaled:scale"),
#          fatsc*fibsc)
#  ## combine SEs, suppressing the warning from the unscaled model
#  s_vals <- cbind(glm=sqrt(diag(vcov(m4.1))),
#                  glmmTMB_unsc=suppressWarnings(sqrt(diag(vcov(m4.2)$cond))),
#                  glmmTMB_sc=sqrt(diag(vcov(m4.3)$cond))*ss)
#  print(s_vals,digits=3)

## ----load_ss_ex,eval=TRUE-----------------------------------------------------
L <- gt_load("vignette_data/sherman.rda")

## ----ss_ex_mod1---------------------------------------------------------------
#  summary(mod1)

## ----diag_1-------------------------------------------------------------------
#  d1 <- diagnose(mod1)

## ----ss_mod2_up, eval=FALSE---------------------------------------------------
#  mod2 <- update(mod1, ziformula=~0)

## ----ss_mod2------------------------------------------------------------------
#  summary(mod2)

## ----ss_diag2-----------------------------------------------------------------
#  diagnose(mod2)

## ----ss_mod2optim,eval=TRUE---------------------------------------------------
mod2_optim <- update(mod2,
                control=glmmTMBControl(optimizer=optim,
                                       optArgs=list(method="BFGS")))

## ----ss_mod2optim_comp,eval=TRUE----------------------------------------------
(parcomp <- cbind(nlminb=unlist(fixef(mod2)),
                  optim=unlist(fixef(mod2_optim))))

## ----comp, echo=FALSE,eval=TRUE-----------------------------------------------
zi1 <- parcomp["disp.(Intercept)","nlminb"]
zi2 <- parcomp["disp.(Intercept)","optim"]
pzi1 <- exp(zi1)
pzi2 <- exp(zi2)

## ----mod3_up, eval=FALSE------------------------------------------------------
#  mod3 <- update(mod2, family=poisson)

## ----ss_mod3------------------------------------------------------------------
#  summary(mod3)

## ----ss_diag3-----------------------------------------------------------------
#  diagnose(mod3)

## ----checkhess----------------------------------------------------------------
#  mod3$sdr$pdHess					

## ----genpois_NaN,cache=TRUE---------------------------------------------------
#  m1 <- glmmTMB(count~spp + mined + (1|site), zi=~spp + mined, Salamanders, family=genpois)

## ----diag_genpois-------------------------------------------------------------
#  diagnose(m1)

## ----NA gradient, error=TRUE, warning=FALSE-----------------------------------
#  dat1 = expand.grid(y=-1:1, rep=1:10)
#  m1 = glmmTMB(y~1, dat1, family=nbinom2)