/
test-methods.R
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test-methods.R
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stopifnot(require("testthat"),
require("glmmTMB"))
data(sleepstudy, cbpp, Pastes,
package = "lme4")
if (getRversion() < "3.3.0") {
sigma.default <- function (object, use.fallback = TRUE, ...)
sqrt(deviance(object, ...)/(nobs(object, use.fallback = use.fallback) -
length(coef(object))))
}
test_that("Fitted and residuals", {
expect_equal(length(fitted(fm2)), nrow(sleepstudy))
expect_equal(mean(fitted(fm2)), 298.507891, tolerance = 1e-6)
expect_equal(mean(residuals(fm2)), 0, tolerance = 1e-4)
## Pearson and response are the same for a Gaussian model
## FIXME: still true after var -> sd shift? why? scale by SD?
expect_equal(residuals(fm2,type="response"),
residuals(fm2,type="pearson"))
## ... but not for Poisson or NB ...
expect_false(mean(residuals(fm2P,type="response"))==
mean(residuals(fm2P,type="pearson")))
expect_false(mean(residuals(fm2NB,type="response"))==
mean(residuals(fm2NB,type="pearson")))
rr2 <- function(x) sum(residuals(x,type="pearson")^2)
## test Pearson resids for gaussian, Gamma vs. base-R versions
ss <- as.data.frame(state.x77)
expect_equal(rr2(glm(Murder~Population,ss,family=gaussian)),
rr2(glmmTMB(Murder~Population,ss,family=gaussian)))
expect_equal(rr2(glm(Murder~Population,ss,family=Gamma(link="log"))),
rr2(glmmTMB(Murder~scale(Population),ss,
family=Gamma(link="log"))),tol=1e-5)
## weights are incorporated in Pearson residuals
## GH 307
tmbm4 <- glm(incidence/size ~ period,
data = cbpp, family = binomial, weights = size)
tmbm5 <- glmmTMB(incidence/size ~ period,
data = cbpp, family = binomial, weights = size)
expect_equal(residuals(tmbm4,type="pearson"),
residuals(tmbm5,type="pearson"),tolerance=1e-6)
## two-column responses give vector of residuals GH 307
tmbm6 <- glmmTMB(cbind(incidence,size-incidence) ~ period,
data = cbpp, family = binomial)
glm6 <- glm(cbind(incidence,size-incidence) ~ period,
data = cbpp, family = binomial)
expect_equal(residuals(tmbm4,type="pearson"),
residuals(tmbm6,type="pearson"), tolerance=1e-6)
## working residuals; compare with glm (GH #776)
expect_equal(residuals(tmbm6, type = "working"),
residuals(glm6, type = "working"), tolerance = 1e-6)
## predict handles na.exclude correctly
## GH 568
b <- rnorm(332)
mu <- exp(1.5 + .26*b)
y <- sapply(mu, function(mu){rpois(1, lambda = mu)})
napos <- 51
b[napos] <- NA
y.na <- y
y.na[napos] <- NA
mod.ex <- glmmTMB(y ~ b, family = "poisson", na.action = "na.exclude",
data = NULL)
## Get predictions/resids
pr.ex <- predict(mod.ex, type = "response") # SEEMS to work fine
expect_equal(which(is.na(pr.ex)),napos)
rs.ex <- residuals(mod.ex, type = "response")
expect_equal(unname(which(is.na(rs.ex))),napos)
pr.rs.ex <- pr.ex + rs.ex
expect_equal(unname(pr.rs.ex), y.na)
})
test_that("Predict", {
expect_equal(predict(fm2),predict(fm2,newdata=sleepstudy))
pr2se <- predict(fm2, se.fit=TRUE)
i <- sample(nrow(sleepstudy), 20)
newdata <- sleepstudy[i, ]
pr2sub <- predict(fm2, newdata=newdata, se.fit=TRUE)
expect_equivalent(pr2se$fit, predict(fm2))
expect_equivalent(pr2se$fit[i], pr2sub$fit)
expect_equivalent(pr2se$se.fit[i], pr2sub$se.fit)
expect_equal(unname( pr2se$ fit[1] ), 254.2208, tol=1e-4)
expect_equal(unname( pr2se$se.fit[1] ), 12.94514, tol=1e-4)
expect_equal(unname( pr2se$ fit[100] ), 457.9684, tol=1e-4)
expect_equal(unname( pr2se$se.fit[100] ), 14.13943, tol=1e-4)
## predict without response in newdata
expect_equal(predict(fm2),
predict(fm2,newdata=sleepstudy[,c("Days","Subject")]))
})
test_that("VarCorr", {
vv <- VarCorr(fm2)
vv2 <- vv$cond$Subject
expect_equal(dim(vv2),c(2,2))
expect_equal(outer(attr(vv2,"stddev"),
attr(vv2,"stddev"))*attr(vv2,"correlation"),
vv2,check.attributes=FALSE)
vvd <- VarCorr(fm2diag)
expect_equal(vvd$cond$Subject[1,2],0) ## off-diagonal==0
})
test_that("drop1", {
dd <- drop1(fm2,test="Chisq")
expect_equal(dd$AIC,c(1763.94,1785.48),tol=1e-4)
})
test_that("anova", {
aa <- anova(fm0,fm2)
expect_equal(aa$AIC,c(1785.48,1763.94),tol=1e-4)
})
test_that("anova ML/REML checks", {
skip_on_cran()
## FIXME: too slow?
## speed up/save so we don't need to skip on CRAN
fmA1 <- glmmTMB(Reaction ~ Days + (Days | Subject), sleepstudy, REML = TRUE)
suppressWarnings(fmA2 <- glmmTMB(Reaction ~ Days + diag(Days | Subject), sleepstudy, REML = TRUE))
fmA3 <- glmmTMB(Reaction ~ 1 + (1 | Subject), sleepstudy, REML = TRUE)
fmA4 <- glmmTMB(Reaction ~ Days + (1 | Subject), sleepstudy, REML = FALSE)
fmA5 <- glmmTMB(Reaction ~ 1 + (1 | Subject), sleepstudy, REML = FALSE)
dd <- data.frame(y=rnorm(100),a=rnorm(100), b=rnorm(100))
fmA6 <- glmmTMB(y~a*b, data=dd, REML=TRUE)
fmA7 <- glmmTMB(y~b*a, data=dd, REML=TRUE)
## ML, differing fixed effects
expect_equal(class(anova(fmA4,fmA5)), c("anova", "data.frame"))
## REML, differing RE
expect_equal(class(anova(fmA1,fmA2)), c("anova", "data.frame"))
## REML, FE in different order
expect_equal(class(anova(fmA6,fmA7)), c("anova", "data.frame"))
expect_false(identical(attr(terms(fmA6),"term.labels"),
attr(terms(fmA7),"term.labels")))
## REML, differing fixed
expect_error(anova(fmA1,fmA3), "Can't compare REML fits with different")
## REML vs ML
expect_error(anova(fmA1,fmA4), "Can't compare REML and ML")
})
test_that("terms", {
## test whether terms() are returned with predvars for doing
## model prediction etc. with complex bases
dd <<- data.frame(x=1:10,y=1:10)
require("splines")
## suppress convergence warnings(we know this is a trivial example)
suppressWarnings(m <- glmmTMB(y~ns(x,3),dd))
## if predvars is not properly attached to term, this will
## fail as it tries to construct a 3-knot spline from a single point
expect_equal(model.matrix(delete.response(terms(m)),data=data.frame(x=1)),
structure(c(1, 0, 0, 0), .Dim = c(1L, 4L), .Dimnames = list("1",
c("(Intercept)", "ns(x, 3)1", "ns(x, 3)2", "ns(x, 3)3")),
assign = c(0L, 1L, 1L, 1L)))
})
test_that("terms back-compatibility", {
f0 <- up2date(readRDS(system.file("test_data", "oldfit.rds",
package="glmmTMB",
mustWork=TRUE)))
expect_true(!is.null(terms(f0)))
})
test_that("summary_print", {
getVal <- function(x,tag="Dispersion") {
cc <- capture.output(print(summary(x)))
if (length(gg <- grep(tag,cc,value=TRUE))==0) return(NULL)
cval <- sub("^.*: ","",gg) ## get value after colon ...
return(as.numeric(cval))
}
## no dispersion printed for Gaussian or disp==1 families
expect_equal(getVal(fm2),654.9,tolerance=1e-2)
expect_equal(getVal(fm2P),NULL)
expect_equal(getVal(fm2G),0.00654,tolerance=1e-2)
expect_equal(getVal(fm2NB,"Dispersion"),286,tolerance=1e-2)
})
test_that("sigma", {
s1 <<- sigma(lm(Reaction~Days,sleepstudy))
s2 <<- sigma(glm(Reaction~Days,sleepstudy,family=Gamma(link="log")))
s3 <<- MASS::glm.nb(round(Reaction)~Days,sleepstudy)
## remove bias-correction
expect_equal(sigma(fm3),s1*(1-1/nobs(fm3)),tolerance=1e-3)
expect_equal(sigma(fm3G),s2,tolerance=5e-3)
expect_equal(s3$theta,sigma(fm3NB),tolerance=1e-4)
})
test_that("confint", {
ci <- confint(fm2, 1:2, estimate=FALSE)
expect_equal(ci,
structure(c(238.406083254105, 7.52295734348693,
264.404107485727, 13.4116167530013),
.Dim = c(2L, 2L),
.Dimnames = list(c("(Intercept)", "Days"),
c("2.5 %", "97.5 %"))),
## answers changed with var -> SD shift, increased tolerance
## rather than substituting new values
tolerance=1e-3)
ciw <- confint(fm2, 1:2, method="Wald", estimate=FALSE)
expect_warning(confint(fm2,type="junk"),
"extra arguments ignored")
## Gamma test Std.Dev and sigma
ci.2G <- confint(fm2G, full=TRUE, estimate=FALSE)
ci.2G.expect <-
structure(c(5.48101734463302, 0.0247781469514953, 0.0720456818212051,
0.0676097041346203, 0.011594983924248, -0.518916569196735, 5.58401849103819,
0.0429217639953163, 0.0907365112688002, 0.150456372085535, 0.0264376535893084,
0.481694558546289), dim = c(6L, 2L), dimnames = list(c("cond.(Intercept)",
"cond.Days", "sigma", "cond.Std.Dev.(Intercept)|Subject", "cond.Std.Dev.Days|Subject",
"cond.Cor.Days.(Intercept)|Subject"), c("2.5 %", "97.5 %")))
expect_equal(ci.2G, ci.2G.expect, tolerance=1e-6)
## nbinom2 test Std.Dev and sigma
ci.2NB <- confint(fm2NB, full=TRUE, estimate=FALSE)
ci.2NB.expect <-
structure(c(5.48098713179567, 0.0248163864044954, 183.810584890723,
0.0661772532477245, 0.0113436358430644, -0.520883898564637, 5.58422550744882,
0.0428993234541745, 444.735666513929, 0.150917865012838, 0.0263549887724962,
0.502211643318002), dim = c(6L, 2L), dimnames = list(c("cond.(Intercept)",
"cond.Days", "sigma", "cond.Std.Dev.(Intercept)|Subject", "cond.Std.Dev.Days|Subject",
"cond.Cor.Days.(Intercept)|Subject"), c("2.5 %", "97.5 %")))
expect_equal(ci.2NB, ci.2NB.expect, tolerance=1e-6)
## profile CI
## ... no RE
ci.prof0 <- confint(fm_noRE, full=TRUE, method="profile", npts=3)
expect_equal(ci.prof0,
structure(c(238.216039176535, 7.99674863649355, 3.758897,
264.368471102549, 12.8955469713508, 3.966739),
.Dim = 3:2, .Dimnames = list(c("(Intercept)", "Days", "d~(Intercept)"),
c("2.5 %", "97.5 %"))),
tolerance=1e-4)
ci.prof <- confint(fm2,parm=1,method="profile", npts=3)
expect_equal(ci.prof,
structure(c(237.27249, 265.13383),
.Dim = 1:2, .Dimnames = list(
"(Intercept)", c("2.5 %", "97.5 %"))),
tolerance=1e-6)
## uniroot CI
ci.uni <- confint(fm2,parm=1,method="uniroot")
expect_equal(ci.uni,
structure(c(237.68071,265.12949,251.4050979),
.Dim = c(1L, 3L),
.Dimnames = list("(Intercept)", c("2.5 %", "97.5 %", "Estimate"))),
## values changed slightly with var -> SD param shift for Gaussian; loosened tolerance
tolerance=1e-3)
## check against 'raw' tmbroot
tmbr <- TMB::tmbroot(fm2$obj,name=1)
expect_equal(ci.uni[1:2],unname(c(tmbr)))
## GH #438
cc <- confint(fm4)
expect_equal(dim(cc),c(5,3))
expect_equal(rownames(cc),
c("(Intercept)", "Illiteracy", "Population", "Area", "`HS Grad`"))
})
test_that("confint with theta/beta", {
set.seed(101)
n <- 1e2
bd <- data.frame(
year=factor(sample(2002:2018, size=n, replace=TRUE)),
class=factor(sample(1:20, size=n, replace=TRUE)),
x1 = rnorm(n),
x2 = rnorm(n),
x3 = factor(sample(c("low","reg","high"), size=n, replace=TRUE),
levels=c("low","reg","high")),
count = rnbinom(n, mu = 3, size=1))
m1 <- glmmTMB(count~x1+x2+x3+(1|year/class),
data = bd, zi = ~x2+x3+(1|year/class), family = truncated_nbinom2,
)
expect_equal(rownames(confint(m1, "beta_")),
c("cond.(Intercept)", "cond.x1", "cond.x2", "cond.x3reg", "cond.x3high",
"zi.(Intercept)", "zi.x2", "zi.x3reg", "zi.x3high"))
expect_equal(rownames(confint(m1, "theta_")),
c("cond.Std.Dev.(Intercept)|class:year", "cond.Std.Dev.(Intercept)|year",
"zi.Std.Dev.(Intercept)|class:year", "zi.Std.Dev.(Intercept)|year"))
})
test_that("confint with multiple REs", {
if (requireNamespace("lme4")) {
dd <- expand.grid(r = 1:10, a = factor(1:2), b = factor(1:3),
f = factor(1:5), g = factor(1:6))
dd$y <- simulate(
seed = 101,
~ 1 + (a|f) + (b|g),
newdata = dd,
newparams = list(beta = 1,
theta = rep(1,9),
sigma = 1),
family = gaussian)[[1]]
res <- glmmTMB(y~ 1 + (a+0|f) + (b+0|g), data = dd)
cc <- confint(res)
expect_identical(rownames(cc),
c("(Intercept)", "Std.Dev.a1|f", "Std.Dev.a2|f", "Cor.a2.a1|f",
"Std.Dev.b1|g", "Std.Dev.b2|g", "Std.Dev.b3|g", "Cor.b2.b1|g",
"Cor.b3.b1|g", "Cor.b3.b2|g"))
}
})
test_that("confint with mapped parameters", {
data(randu)
randu$A <- factor(rep(c(1,2), 200))
randu$B <- factor(rep(c(1,2,3,4), 100))
test0 <- glmmTMB(y ~ x + z + (0 +x|A) + (1|B), family="gaussian", data=randu)
test1 <- update(test0,
start = list(theta = c(0,log(1e3))),
map = list(theta = factor(c(1,NA))))
test2 <- update(test0,
start = list(beta = c(1,0,0)),
map = list(beta = factor(c(1,NA,2))))
## getParms() not exported ...
## expect_equal(getParms("beta_", test2), 1:2)
## expect_equal(getParms("beta_", test2, include_mapped = TRUE), 1:3)
v1 <- vcov(test2, include_nonest = TRUE)
expect_equal(dim(v1$cond), c(3,3))
expect_true(all(is.na(v1$cond["x",] )))
c1 <- confint(test2, parm = "beta_", include_nonest = TRUE)
expect_equal(nrow(c1), 3)
expect_equal(unname(unlist(c1["x",])), c(NA_real_, NA_real_, 0))
## getParms("theta_", test2) ## 4:5
## getParms("theta_", test2, include_mapped = TRUE) ## 5:6
c3 <- confint(test2)
expect_equal(nrow(c3), 4)
expect_equal(rownames(c3),
c("(Intercept)", "z", "Std.Dev.x|A", "Std.Dev.(Intercept)|B"))
c4 <- confint(test2, include_nonest = TRUE)
expect_equal(confint(test2, include_nonest = TRUE, parm = "theta_"),
confint(test2, parm = "theta_"))
c5 <- confint(test2, parm = "sigma")
## expect_equal(getParms("theta_", test1), 5L)
## expect_equal(getParms("theta_", test1, include_mapped = TRUE), 5:6)
v2 <- vcov(test1, include_nonest = TRUE, full = TRUE)
expect_equal(dim(v2), c(6,6))
expect_true(all(is.na(v2["theta_1|B.1",])))
c6 <- confint(test1, include_nonest = TRUE)
expect_equal(rownames(c6),
c("(Intercept)", "x", "z", "Std.Dev.x|A", "Std.Dev.(Intercept)|B"))
c7 <- confint(test1, parm = "theta_")
expect_equal(rownames(c7), "Std.Dev.x|A")
c8 <- confint(test1, parm = "theta_", include_nonest = TRUE)
expect_equal(rownames(c8), c("Std.Dev.x|A", "Std.Dev.(Intercept)|B"))
expect_equal(unname(c8["Std.Dev.(Intercept)|B", 1:2]), rep(NA_real_, 2))
})
test_that("profile", {
p1_th <- profile(fm1, parm="theta_", npts=4)
expect_true(all(p1_th$.par=="theta_1|Subject.1"))
p1_b <- profile(fm1,parm="beta_",npts=4)
expect_equal(unique(as.character(p1_b$.par)),
c("(Intercept)","Days"))
})
test_that("profile (no RE)", {
p0_th <- profile(fm_noRE,npts=4)
expect_equal(dim(p0_th),c(41,3))
})
test_that("vcov", {
expect_equal(dim(vcov(fm2)[[1]]),c(2,2))
expect_equal(dim(vcov(fm2,full=TRUE)),c(6,6))
expect_equal(rownames(vcov(fm2,full=TRUE)),
structure(c("(Intercept)", "Days", "d~(Intercept)",
"theta_Days|Subject.1", "theta_Days|Subject.2",
"theta_Days|Subject.3"),
.Names = c("cond1", "cond2", "disp", "theta1", "theta2", "theta3")))
## vcov doesn't include dispersion for non-dispersion families ...
expect_equal(dim(vcov(fm2P,full=TRUE)),c(5,5))
## oops, dot_check() disabled in vcov.glmmTMB ...
## expect_error(vcov(fm2,x="junk"),"unknown arguments")
})
set.seed(101)
test_that("simulate", {
sm2 <<- rowMeans(do.call(cbind, simulate(fm2, 10)))
sm2P <<- rowMeans(do.call(cbind, simulate(fm2P, 10)))
sm2G <<- rowMeans(do.call(cbind, simulate(fm2G, 10)))
sm2NB <<- rowMeans(do.call(cbind, simulate(fm2NB, 10)))
expect_equal(sm2, sleepstudy$Reaction, tol=20)
expect_equal(sm2P, sleepstudy$Reaction, tol=20)
expect_equal(sm2G, sleepstudy$Reaction, tol=20)
expect_equal(sm2NB, sleepstudy$Reaction, tol=20)
})
test_that("formula", {
expect_equal(formula(fm2),Reaction ~ Days + (Days | Subject))
expect_equal(formula(fm2, fixed.only=TRUE),Reaction ~ Days)
expect_equal(formula(fm2, component="disp"), ~1)
expect_equal(formula(fm2, component="disp", fixed.only=TRUE), ~1)
expect_equal(formula(fm2, component="zi"), ~0)
expect_equal(formula(fm2, component="zi", fixed.only=TRUE), ~0)
})
context("simulate consistency with glm/lm")
test_that("binomial", {
s1 <- simulate(f1b, 5, seed=1)
s2 <- simulate(f2b, 5, seed=1)
s3 <- simulate(f3b, 5, seed=1)
expect_equal(max(abs(as.matrix(s1) - as.matrix(s2))), 0)
expect_equal(max(abs(as.matrix(s1) - as.matrix(s3))), 0)
})
test_that("residuals from binomial factor responses", {
expect_equal(residuals(fm2Bf),residuals(fm2Bn))
})
mkstr <- function(dd) {
ff <- which(vapply(dd,is.factor,logical(1)))
for (i in ff) {
dd[[i]] <- as.character(dd[[i]])
}
return(dd)
}
rr <- function(txt) {
read.table(header=TRUE,stringsAsFactors=FALSE,text=txt,
colClasses=rep(c("character","numeric"),c(5,2)))
}
context("Ranef etc.")
test_that("as.data.frame(ranef(.)) works",
{
expect_equal(
mkstr(as.data.frame(ranef(fm3ZIP))[c("cond.1","cond.19","zi.1"),]),
rr(
" component grpvar term grp condval condsd
cond.1 cond Subject (Intercept) 308 1.066599e-02 0.040430751
cond.19 cond Subject Days 308 2.752424e-02 0.007036958
zi.1 zi Subject (Intercept) 308 -2.850238e-07 0.127106817
"),
tolerance=1e-5)
expect_equal(
mkstr(as.data.frame(ranef(fm2diag2))[c("cond.1","cond.19"),]),
rr(
" component grpvar term grp condval condsd
cond.1 cond Subject (Intercept) 308 1.854597 13.294388
cond.19 cond Subject Days 308 9.236420 2.699692
"),
tolerance=1e-5)
})
test_that("ranef(.) works with more than one grouping factor",
{
expect_equal(sort(names(ranef(fmP)[["cond"]])), c("batch","sample"))
expect_equal(dim(as.data.frame(ranef(fmP))), c(40,6))
})
test_that("coef(.) works", {
cc <- coef(fm3ZIP)
expect_equal(cc[["cond"]][[1]][1,],
structure(list(`(Intercept)` = 5.54291514202372,
Days = 0.0613847280572168),
row.names = "308", class = "data.frame"),
tolerance=1e-5)
expect_equal(cc[["zi"]][[1]][1,,drop=FALSE],
structure(list(`(Intercept)` = -13.2478200379555), row.names = "308", class = "data.frame"),
tolerance=1e-5)
})
test_that("simplified coef(.) printing", {
op <- options(digits=2)
cc <- capture.output(print(coef(fm0)))
expect_equal(cc[1:3],c("$Subject", " Days (Intercept)", "308 20.6 249"))
options(op)
})
## weird stuff here with environments, testing ...
test_that("various binomial response types work", {
skip_on_cran()
## FIXME: test for factors, explicit cbind(.,.)
## do we need to define this within this scope?
ddb <- data.frame(y=I(yb))
ddb <- within(ddb, {
w <- rowSums(yb)
prop <- y[,1]/w
})
s1 <- simulate(f1b, 1, seed=1)
f1 <- fixef(refit(f1b,s1[[1]]))
s3 <- simulate(f3b, 1, seed=1)
f3 <- fixef(refit(f3b,s3[[1]]))
expect_equal(f1,f3)
expect_error(refit(f4b,s3[[1]]),
"can't find response in data")
})
test_that("binomial response types work with data in external scope", {
s1 <- simulate(f1b, 1, seed=1)
f1 <- fixef(refit(f1b,s1[[1]]))
s3 <- simulate(f3b, 1, seed=1)
f3 <- fixef(refit(f3b,s3[[1]]))
expect_equal(f1,f3)
})
test_that("confint works for models with dispformula", {
## FIXME: should make this an example
sim1 <- function(nfac=40, nt=100, facsd=0.1, tsd=0.15, mu=0, residsd=1) {
dat <- expand.grid(fac=factor(letters[1:nfac]), t=1:nt)
n <- nrow(dat)
dat$REfac <- rnorm(nfac, sd=facsd)[dat$fac]
dat$REt <- rnorm(nt, sd=tsd)[dat$t]
dat$x <- rnorm(n, mean=mu, sd=residsd) + dat$REfac + dat$REt
dat
}
set.seed(101)
d1 <- sim1(mu=100, residsd=10)
d2 <- sim1(mu=200, residsd=5)
d1$sd <- "ten"
d2$sd <- "five"
dat <- rbind(d1, d2)
m1 <- glmmTMB(x ~ sd + (1|t), dispformula=~sd, data=dat)
ref_val <-
structure(c(1.57425515082352, 0.654799732331337, 1.62861475468597,
0.731675819905297, 1.60143495275475, 0.693237776118317), dim = 2:3,
dimnames = list(c("disp.(Intercept)", "disp.sdten"), c("2.5 %", "97.5 %",
"Estimate")))
cc <- confint(m1)
expect_equal(cc[grep("^disp",rownames(cc)),], ref_val, tolerance = 1e-6)
})
simfun <- function(formula, family, data, beta=c(0,1)) {
ss <- list(beta=beta)
if (grepl("nbinom",family)) ss$betad <- 0
suppressWarnings(m1 <- glmmTMB(formula,
family=family,
data=data,
start=ss,
control=glmmTMBControl(optCtrl=list(eval.max=0,iter.max=0))))
return(m1)
}
ntab <- function(formula=y~x, family, data, seed=101) {
set.seed(seed)
m1 <- simfun(formula, family, data)
return(table(exp(data$x),unlist(simulate(m1))))
}
pfun <- function(i,tab, dist="nbinom2", data, plot=TRUE) {
n <- as.numeric(names(tab[i,]))
s_tab <- tab[i,]/sum(tab[i,])
if (plot) plot(n,s_tab)
m <- exp(data$x)[i]
argList <- switch(dist,
nbinom1=list(n, phi=1, mu=m),
nbinom2=list(n, size=1, mu=m),
poisson=list(n, lambda=m))
expected <- do.call(paste0("dtruncated_",dist), argList)
if (plot) lines(n,expected)
return(list(n = n, obs = s_tab, exp = expected))
}
test_that("trunc nbinom simulation", {
## GH 572
dd <- data.frame(f=factor(1:2),
y=rep(1,2))
## results for second element of sim, depending on family:
simres <- c(truncated_nbinom2=1,truncated_nbinom1=2)
for (f in paste0("truncated_nbinom",1:2)) {
## generate a model with two groups, one with a ridiculously low (log mean).
## don't allow the optimizer to actually do anything, so coefs will remain
## at their starting values
m1 <- simfun(y~f, family=f, data=dd, beta=c(-40,39))
expect_equal(fixef(m1)$cond, c(`(Intercept)` = -40, f2 = 39))
res <- list("truncated_nbinom1" = c(1.44269504088896, 1.6344435754591),
"truncated_nbinom2" = c(1, 1 + exp(-1)))
## values were previously 0, exp(-1) regardless of nbinom1 vs nbinom2 (dispersion param == 1, start value)
## now that response predicts mean of *truncated* distribution, they differ
expect_equal(fitted(m1), res[[f]], tolerance = 1e-5)
## should NOT get NaN (or zero) for the first group if hack/fix is working
expect_equal(unname(unlist(simulate(m1,seed=101))),c(1,1))
}
})
test_that("trunc nbinom sim 2", {
set.seed(101)
dd <- expand.grid(x=log(1:5),
rep=1:10000,
y=1)
t1 <- ntab(family="truncated_nbinom1", data=dd)
t2 <- ntab(family="truncated_nbinom2", data=dd)
p1 <- pfun(1,tab=t1,dist="nbinom1",data=dd, plot=FALSE)
p2 <- pfun(1,tab=t2,dist="nbinom2",data=dd, plot=FALSE)
expect_equal(unname(p1$obs), p1$exp, tolerance = 0.01)
expect_equal(unname(p2$obs), p2$exp, tolerance = 0.01)
if (FALSE) {
op <- par(ask=TRUE)
for (i in 1:nrow(t1)) pfun(i,tab=t1,dist="nbinom1",data=dd)
for (i in 1:nrow(t2)) pfun(i,tab=t2,dist="nbinom2",data=dd)
par(op)
}
})
test_that("trunc poisson simulation", {
dd <- expand.grid(x=log(1:5),
rep=1:10000,
y=1)
t3 <- ntab(family="truncated_poisson", data=dd)
expect_equal(unname(t3[1,1:6]),
c(5829L, 2905L, 963L, 242L, 56L, 5L))
## explore
if (FALSE) {
op <- par(ask=TRUE)
for (i in 1:nrow(t3)) pfun(i,tab=t3,dist="poisson",data=dd)
par(op)
}
})
test_that("de novo simulation", {
dd <- data.frame(x = 1:10)
expect_error(simulate_new(y ~ x), "should take a one-sided")
ss <- simulate_new(~ x,
seed = 101,
family = gaussian,
newdata = dd,
newparams = list(beta = 1:2, betad = 0))
expect_equal(head(ss[[1]], 2),
c(2.67396350948461, 5.55246185541914))
})
test_that("de novo simulation with binomial N>1", {
dd <- data.frame(x = 1:10)
ss <- simulate_new(~ x,
seed = 101,
family = binomial,
weights = rep(10, 10),
newdata = dd,
newparams = list(beta = c(-0.5, 0.1)))
expect_equal(head(ss[[1]], 2),
c(3, 2))
})
test_that("de novo simulation error checking", {
dd <- data.frame(x = 1:10)
expect_error(simulate_new(~ x,
seed = 101,
family = gaussian,
newdata = dd,
newparams = list(beta = 0)),
"length mismatch in component beta")
expect_warning(simulate_new(~ x,
seed = 101,
family = gaussian,
newdata = dd,
newparams = list(beta = rep(0,2),
junk = 1:3)),
"unmatched parameter names: junk")
})
test_that("good simulate_new response values for beta", {
data("sleepstudy", package = "lme4")
ss <- simulate_new(
~ Days + (Days | Subject),
newdata = sleepstudy,
newparams = list(beta = c(-1, 0.1),
theta = c(-1, -1, 0),
betad = 10),
family = "beta_family",
seed = 101)
expect_equal(head(ss[[1]], 3),
c(0.246573218210702, 0.309824346705961, 0.367484246522732))
})
test_that("weighted residuals", {
set.seed(101)
data("cbpp", package = "lme4")
wts <- sample(1:2, size = nrow(cbpp), replace = TRUE)
## Pearson tested above ...
tmbm4 <- glm(incidence ~ period,
data = cbpp, family = poisson, weights = wts)
tmbm5 <- glmmTMB(incidence ~ period,
data = cbpp, family = poisson, weights = wts)
for (type in eval(formals(residuals.glmmTMB)$type)) {
expect_equal(residuals(tmbm4, type = type),
residuals(tmbm5, type = type),
tolerance = 1e-6)
}
})
# This test started also giving a warning on os "mac".
# test_that("bad inversion in vcov", {
# skip_on_os(c("windows", "linux"))
# d <- readRDS(system.file("test_data", "strengejacke_nasummary.rds",
# package = "glmmTMB"))
# m <- glmmTMB(
# QoL ~ time + age + x_tv_dm + x_tv_gm + z1_ti + z2_ti + (1 + time | ID) + (1 + x_tv_dm | ID),
# data = d,
# REML = TRUE
# )
# ## only fails on some platforms ... this is sufficient for now ... FIXME
# if (getRversion() >= "4.3.0") {
# expect_true(all(is.na(vcov(m)$cond)))
# }
# })