R Under development (unstable) (2021-03-22 r80104) -- "Unsuffered Consequences"
Copyright (C) 2021 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64 (64-bit)
R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.
R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.
Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.
> ### Regression tests for fixed bugs
>
> suppressWarnings(RNGversion("3.5.2"))
> set.seed(290875)
> library("coin")
Loading required package: survival
> isequal <- coin:::isequal
> `%GE%` <- coin:::`%GE%`
> options(useFancyQuotes = FALSE)
>
> ### I() returns objects of class "AsIs" causing errors in 'trafo'
> df <- data.frame(x1 = rnorm(100), x2 = rnorm(100), x3 = gl(2, 50),
+ x4 = I(letters[1:20]))
> df <- within(df, {
+ x5 <- x1 / x2
+ x6 <- x1 < 0
+ })
> it1 <- independence_test(I(x1 / x2) ~ x3, data = df)
> it2 <- independence_test(x5 ~ x3, data = df)
> stopifnot(identical(statistic(it1), statistic(it2))) # was OK
> it3 <- independence_test(I(x1 < 0) ~ x3, data = df)
> it4 <- independence_test(x6 ~ x3, data = df)
> stopifnot(identical(statistic(it3), statistic(it4))) # wrong sign
> try(independence_test(x4 ~ x3, data = df)) # coercion to numeric
Error in ytrafo(object@y) : data class "character" is not supported
>
> ### expectation was wrong when varonly = TRUE in case both
> ### xtrafo and ytrafo were multivariate
> if (require("multcomp")) {
+ df <- data.frame(x = runif(30), y = runif(30), z = gl(3, 10))
+ a <- independence_test(x + y ~ z, data = df,
+ distribution = approximate(nresample = 19999),
+ xtrafo = function(data) trafo(data, factor_trafo = function(x)
+ model.matrix(~x - 1) %*% t(contrMat(table(x), "Tukey"))))
+ b <- independence_test(x + y ~ z, data = df,
+ xtrafo = function(data) trafo(data, factor_trafo = function(x)
+ model.matrix(~x - 1) %*% t(contrMat(table(x), "Tukey"))))
+ isequal(expectation(a), expectation(b))
+ }
Loading required package: multcomp
Loading required package: mvtnorm
Loading required package: TH.data
Loading required package: MASS
Attaching package: 'TH.data'
The following object is masked from 'package:MASS':
geyser
[1] TRUE
>
>
> ### 'statistic' for linear and standardized statistics was wrong in case of
> ### scores
> data("jobsatisfaction")
> stopifnot(unique(dim(statistic(lbl_test(jobsatisfaction), "linear"))) == 1)
> stopifnot(unique(dim(statistic(lbl_test(jobsatisfaction), "standardized"))) == 1)
>
>
> ### support() failed in most cases
> df <- data.frame(x = runif(20), y = runif(20), z = gl(2, 10))
> stopifnot(is.na(support(independence_test(x ~ z, data = df))))
> stopifnot(is.na(support(independence_test(x ~ z, data = df, teststat = "quad"))))
> ite <- independence_test(I(round(x, 1)) ~ z, data = df, dist = exact())
> ae <- support(ite)
> de <- dperm(ite, ae)
> stopifnot(isequal(sum(de), 1))
> pe <- pperm(ite, ae)
> stopifnot(isequal(cumsum(de), pe))
> ita <- independence_test(I(round(x, 1)) ~ z, data = df,
+ dist = approximate(nresample = 100000))
> aa <- support(ita)
> da <- dperm(ita, aa)
> stopifnot(isequal(sum(da), 1))
> pa <- pperm(ita, aa)
> stopifnot(isequal(cumsum(da), pa))
> mean(round(ae, 10) %in% round(aa, 10))
[1] 1
>
> plot(aa, da, type = "s", lty = 1)
> lines(ae, de, type = "s", lty = 2)
> itas <- independence_test(I(round(x, 1)) ~ z, data = df)
> lines(ae[-1], diff(sapply(ae, function(x) pperm(itas, x))), lty = 3)
> legend("topleft", lty = 1:3, legend = c("approx", "exact", "asympt"), bty = "n")
>
> ### check correct handling of multiple censoring indicators (in modeltools)
> ### was never wrong, just in case...
> data("photocar", package = "coin")
> i1 <- independence_test(Surv(time, event) + Surv(dmin, tumor) + ntumor ~ group,
+ data = photocar)
> i2 <- independence_test(Surv(time, event) ~ group, data = photocar)
> i3 <- independence_test(Surv(dmin, tumor) ~ group, data = photocar)
>
> stopifnot(max(abs(statistic(i1, "standardized")[,1] -
+ statistic(i2, "stand"))) < sqrt(.Machine$double.eps))
> stopifnot(max(abs(statistic(i1, "standardized")[,2] -
+ statistic(i3, "stand"))) < sqrt(.Machine$double.eps))
>
> ### check new var_trafo argument
> x <- rnorm(20)
> y <- gl(2, 10)
> a <- trafo(data.frame(x = x, y = y), numeric_trafo = normal_trafo)
> b <- trafo(data.frame(x = x, y = y), var_trafo = list(x = normal_trafo))
> stopifnot(isequal(a, b))
>
> ### check for multiple ordered factors
> mydf <- data.frame(x = ordered(gl(4, 5)), y = ordered(gl(5, 4)),
+ z = rnorm(20))
> it1 <- independence_test(x + y ~ z , data = mydf)
> stopifnot(isequal(drop(statistic(it1, "linear")),
+ c(statistic(independence_test(x ~ z , data = mydf), "linear"),
+ statistic(independence_test(y ~ z , data = mydf), "linear"))))
> it1 <- independence_test(x + z ~ y , data = mydf)
> stopifnot(isequal(drop(statistic(it1, "linear")),
+ c(statistic(independence_test(x ~ y , data = mydf), "linear"),
+ statistic(independence_test(z ~ y , data = mydf), "linear"))))
> it1 <- independence_test(z ~ x + y , data = mydf)
> stopifnot(isequal(drop(statistic(it1, "linear")),
+ c(statistic(independence_test(z ~ x , data = mydf), "linear"),
+ statistic(independence_test(z ~ y , data = mydf), "linear"))))
>
> ### NA's and weights
> mydf <- data.frame(x = 1:10, y = gl(2, 5), w = rep(2, 10))
> s <- statistic(independence_test(x ~ y, data = mydf, weights = ~ w), "linear")
> stopifnot(s == 30)
> mydf$x[1] <- NA
> s <- statistic(independence_test(x ~ y, data = mydf, weights = ~ w), "linear")
> stopifnot(s == 28)
>
> ### two observations only
> mydf <- data.frame(x = 1:10, y = factor(rep(c(1, 2), 5)))
> independence_test(y ~ x, data = mydf, subset = c(1, 6))
Asymptotic General Independence Test
data: y by x
Z = -1, p-value = 0.3173
alternative hypothesis: two.sided
> independence_test(y ~ x, data = mydf, subset = c(1, 2))
Asymptotic General Independence Test
data: y by x
Z = -1, p-value = 0.3173
alternative hypothesis: two.sided
> try(independence_test(y ~ x, data = mydf, subset = 1))
Error in validObject(.Object) :
invalid class "IndependenceProblem" object: FALSE
>
> ### names of expectation and covariance
> YOY <- data.frame(length = c(46, 28, 46, 37, 32, 41, 42, 45, 38, 44,
+ 42, 60, 32, 42, 45, 58, 27, 51, 42, 52,
+ 38, 33, 26, 25, 28, 28, 26, 27, 27, 27,
+ 31, 30, 27, 29, 30, 25, 25, 24, 27, 30),
+ site = factor(c(rep("I", 10), rep("II", 10),
+ rep("III", 10), rep("IV", 10))))
>
> it <- independence_test(length ~ site, data = YOY,
+ ytrafo = function(data) trafo(data, numeric_trafo = rank_trafo),
+ teststat = "quad")
> expectation(it)
I 205
II 205
III 205
IV 205
> covariance(it)
I II III IV
I 1019.0385 -339.6795 -339.6795 -339.6795
II -339.6795 1019.0385 -339.6795 -339.6795
III -339.6795 -339.6795 1019.0385 -339.6795
IV -339.6795 -339.6795 -339.6795 1019.0385
>
> mydf <- data.frame(x = rnorm(10), y = rnorm(10), z = gl(2, 5))
> it <- independence_test(x + y ~ z, data = mydf)
> statistic(it, "linear")
x y
1 -2.066068 0.3292961
> expectation(it)
x y
1 -1.634002 -0.9750075
> covariance(it)
1:x 1:y
1:x 0.4417981 -0.8139286
1:y -0.8139286 2.5231787
>
> ### maxstat_trafo
> n <- seq(from = 5, to = 100, by = 1)
> for (i in n) {
+ x <- round(rnorm(i) * 10, 1)
+ xm <- maxstat_trafo(x)
+ stopifnot(min(c(mean(xm[,1]), 1 - mean(xm[,ncol(xm)])) - 0.1) >
+ -sqrt(.Machine$double.eps))
+ }
>
> ### formula evaluation in 'parent.frame()', spotted by Z
> foo <- function(x, y) independence_test(y ~ x)
> a <- 1:10
> b <- 1:10
> foo(a, b)
Asymptotic General Independence Test
data: y by x
Z = 3, p-value = 0.0027
alternative hypothesis: two.sided
> x <- 1
> y <- 1
> foo(a, b)
Asymptotic General Independence Test
data: y by x
Z = 3, p-value = 0.0027
alternative hypothesis: two.sided
>
> ### factors with only one level
> dat <- data.frame(y = rnorm(100), x1 = runif(100), x2 = factor(rep(0, 100)))
> try(independence_test(y ~ x1 + x2, data = dat))
Error in factor_trafo(x) :
can't deal with factors containing only one level
>
> ### user specified g: names, MC
> me <- as.table(matrix(c( 6, 8, 10,
+ 32, 47, 20), byrow = TRUE, nrow = 2,
+ dimnames = list(group = c("In situ", "Control"),
+ genotype = c("AA", "AG", "GG"))))
> medf <- as.data.frame(me)
>
> add <- c(0, 1, 2)
> dom <- c(0, 1, 1)
> rez <- c(0, 0, 1)
> g <- function(x) {
+ x <- unlist(x)
+ cbind(add[x], dom[x], rez[x])
+ }
> it <- independence_test(group ~ genotype,
+ data = medf, weights = ~ Freq, xtrafo = g)
> statistic(it, "linear")
In situ
X1 28
X2 18
X3 10
>
> it <- independence_test(group ~ genotype,
+ data = medf, weights = ~ Freq, xtrafo = g,
+ distribution = approximate(nresample = 49999))
> pvalue(it)
[1] 0.06848137
99 percent confidence interval:
0.06560306 0.07144217
>
> stopifnot(all.equal(statistic(independence_test(t(me), xtrafo = g), "linear"),
+ statistic(it, "linear")))
>
> ### alternative trafo for ordered variables didn't work
> ### spotted by Ludwig Hothorn <hothorn@biostat.uni-hannover.de>
> tmp <- data.frame(x = ordered(sample(1:3, 20, replace = TRUE)), y = rnorm(20))
> it1 <- independence_test(y ~ x, data = tmp, scores = list(x = c(1, 1, 2)))
> g <- function(x) c(1, 1, 2)[unlist(x)]
> it2 <- independence_test(y ~ x, data = tmp, xtrafo = g)
> it3 <- independence_test(y ~ x, data = tmp,
+ xtrafo = function(data) trafo(data, ordered_trafo = g))
> stopifnot(all.equal(statistic(it1), statistic(it2)))
> stopifnot(all.equal(statistic(it1), statistic(it3)))
>
> ### precision problems in SR algorithm, >= <= issue
> ### spotted by "Fay, Michael (NIH/NIAID) [E]" <mfay@niaid.nih.gov>
> x <- c(1,2,3.1,4,5,6)
> g <- factor(c(0,0,0,1,1,1))
> it <- independence_test(x ~ g, distribution = exact())
> stopifnot(pvalue(it) == 0.1)
> itMC <- independence_test(x ~ g, distribution = approximate(99999))
> ci <- attr(pvalue(itMC), "conf.int")
> stopifnot(ci[1] < pvalue(it) && ci[2] > pvalue(it))
>
> ### any() not applied to logicals
> ### spotted by R-2.7.0 and Kaspar Daniel Hansen
> x <- c(1.83, 0.50, 1.62, 2.48, 1.68, 1.88, 1.55, 3.06, 1.30)
> y <- c(0.878, 0.647, 0.598, 2.05, 1.06, 1.29, 1.06, 3.14, 1.29)
> ### must not give a warning
> wilcoxsign_test(x ~ y, alternative = "greater",
+ distribution = exact())
Exact Wilcoxon-Pratt Signed-Rank Test
data: y by x (pos, neg)
stratified by block
Z = 2.0732, p-value = 0.01953
alternative hypothesis: true mu is greater than 0
>
> ### inconsistencies with confidence intervals
> ### spotted by Fritz Scholz <fscholz@u.washington.edu>
> Route = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L,
+ 2L, 2L, 2L), .Label = c("A", "B"), class = "factor")
> Route.Time = c(5.8, 5.8, 5.9, 6, 6, 6, 6.3, 6.3, 6.4, 6.5, 6.5, 6.5,
+ 6.8, 7.1, 7.3, 10.2)
> Route2 <- factor(as.character(Route), levels = c("B", "A"))
>
> wilcox_test(Route.Time~Route,conf.int=TRUE)
Asymptotic Wilcoxon-Mann-Whitney Test
data: Route.Time by Route (A, B)
Z = -3.0245, p-value = 0.002491
alternative hypothesis: true mu is not equal to 0
95 percent confidence interval:
-3.7 -0.5
sample estimates:
difference in location
-0.9
> wilcox_test(Route.Time~Route2,conf.int=TRUE)
Asymptotic Wilcoxon-Mann-Whitney Test
data: Route.Time by Route2 (B, A)
Z = 3.0245, p-value = 0.002491
alternative hypothesis: true mu is not equal to 0
95 percent confidence interval:
0.5 3.7
sample estimates:
difference in location
0.9
> wilcox_test(Route.Time~Route,conf.int=TRUE, distr = exact())
Exact Wilcoxon-Mann-Whitney Test
data: Route.Time by Route (A, B)
Z = -3.0245, p-value = 0.001374
alternative hypothesis: true mu is not equal to 0
95 percent confidence interval:
-3.7 -0.5
sample estimates:
difference in location
-0.9
> wilcox_test(Route.Time~Route2,conf.int=TRUE, distr = exact())
Exact Wilcoxon-Mann-Whitney Test
data: Route.Time by Route2 (B, A)
Z = 3.0245, p-value = 0.001374
alternative hypothesis: true mu is not equal to 0
95 percent confidence interval:
0.5 3.7
sample estimates:
difference in location
0.9
>
> ### evaluate all formulae in xxx_tests parent.frame
> ### spotted by Matthieu Dubois <matthdub@gmail.com>
> y <- as.data.frame(matrix(rnorm(200), ncol=2))
> group <- gl(2, 50)
> lapply(y, function(var) wilcox_test(var ~ group))
$V1
Asymptotic Wilcoxon-Mann-Whitney Test
data: var by group (1, 2)
Z = -0.39295, p-value = 0.6944
alternative hypothesis: true mu is not equal to 0
$V2
Asymptotic Wilcoxon-Mann-Whitney Test
data: var by group (1, 2)
Z = 0.79968, p-value = 0.4239
alternative hypothesis: true mu is not equal to 0
>
> ### make sure a parallel design with
> ### n = 2 isn't confused with a block design
> ### spotted by Fritz Scholz <fscholz@u.washington.edu>
> dat <- data.frame(y = c(1, 2), g = gl(2, 1))
> wt <- wilcox_test(y ~ g, data = dat, distribution = exact())
> s <- support(wt)
> stopifnot(all(dperm(wt, s) == c(0.5, 0.5)))
>
> ### dpqperm
> wte <- wilcox_test(Route.Time ~ Route, distribution = exact())
> wta <- wilcox_test(Route.Time ~ Route, distribution = approximate())
> de <- dperm(wte, support(wte))
> pe <- pperm(wte, support(wte))
> stopifnot(isequal(cumsum(de), pe))
> da <- dperm(wta, support(wta))
> pa <- pperm(wta, support(wta))
> stopifnot(isequal(cumsum(da), pa))
> qperm(wte, seq(from = 0.1, to = 0.9, by = 0.1))
[1] -1.3125012 -0.8559791 -0.5135874 -0.2853264 0.0000000 0.2853264 0.5706527
[8] 0.8559791 1.2554359
> qperm(wta, seq(from = 0.1, to = 0.9, by = 0.1))
[1] -1.3125012 -0.8559791 -0.5135874 -0.2282611 0.0000000 0.2853264 0.5135874
[8] 0.8559791 1.3125012
>
> ### split-up and confint (spotted by Fritz Scholz <fscholz@u.washington.edu>)
> iseed <- 25
> n <- m <- 4
> conf.level <- 0.98
> alternative <- "greater"
> set.seed(iseed)
> x <- round(rnorm(m), 2)
> y <- round(rnorm(n, 2), 2)
> score.factor <- factor(c(rep("Y",n),rep("X",m)),
+ levels = c("Y","X"))
> dat.fr <- data.frame(scores=c(y,x), fac = score.factor)
> it <- normal_test(scores ~ fac, data = dat.fr,
+ conf.int = TRUE, conf.level = conf.level,
+ alternative = alternative, dist = exact())
> confint(it)
98 percent confidence interval:
0.18 Inf
sample estimates:
difference in location
2.645
>
> ### error messages
> ### first group completely empty
> x <- c(NA, NA, NA)
> y <- c(2,4, 3)
> z <- factor(c(1,1,1,2,2,2))
> u <- c(x,y)
> try(wilcox_test(u ~ z))
Error in factor_trafo(x) :
can't deal with factors containing only one level
>
> ### missing values
> x <- c(NA, NA, 1)
> y <- c(2, NA, NA)
> z <- factor(c(1,1,1,2,2,2))
> u <- c(x,y)
> wilcox_test(u ~ z)
Asymptotic Wilcoxon-Mann-Whitney Test
data: u by z (1, 2)
Z = -1, p-value = 0.3173
alternative hypothesis: true mu is not equal to 0
>
> x <- c(NA, 1, 2, 8)
> y <- c(2, 4, NA, 3)
> wilcoxsign_test(x ~ y)
Asymptotic Wilcoxon-Pratt Signed-Rank Test
data: y by x (pos, neg)
stratified by block
Z = 0.44721, p-value = 0.6547
alternative hypothesis: true mu is not equal to 0
>
> ### no observations left after removing NAs
> x <- c(NA, NA)
> y <- c(1, 1)
> try(wilcoxsign_test(x ~ y))
Error in validObject(.Object) :
invalid class "SymmetryProblem" object: FALSE
In addition: Warning message:
In max(abs(object@weights - floor(object@weights))) :
no non-missing arguments to max; returning -Inf
>
> ### problem in coin 1.0-12 fixed
> x <- c(1, 2, 3)
> y <- c(0, 1, 0)
> wilcoxsign_test(x ~ y)
Asymptotic Wilcoxon-Pratt Signed-Rank Test
data: y by x (pos, neg)
stratified by block
Z = 1.633, p-value = 0.1025
alternative hypothesis: true mu is not equal to 0
>
> ### as.integer(round(x)) is safer than as.integer(x)
> water_transfer <- data.frame(
+ pd = c(0.80, 0.83, 1.89, 1.04, 1.45, 1.38, 1.91,
+ 1.64, 0.73, 1.46, 1.15, 0.88, 0.90, 0.74, 1.21) * 100 - 72,
+ age = factor(c(rep("At term", 10),
+ rep("12-26 Weeks", 5))))
>
> ### check this out
> # water_transfer$pd[11]
> # as.integer(water_transfer$pd[11])
> # as.integer(round(water_transfer$pd[11]))
>
> p1 <- pvalue(independence_test(pd ~ age, data = water_transfer,
+ alternative = "less",
+ distribution = exact(algorithm = "shift")))
> p2 <- pvalue(independence_test(pd ~ age, data = water_transfer,
+ alternative = "less",
+ distribution = exact(algorithm = "split")))
> stopifnot(isequal(p1, p2))
>
> ### monotonicity wasn't enforced for "step-down"
> set.seed(290875)
>
> gr <- gl(2, 50)
> x1 <- rnorm(100) + (as.numeric(gr) - 1) * 0.5
> x2 <- rnorm(100) - (as.numeric(gr) - 1) * 0.5
>
> it <- independence_test(x1 + x2 ~ gr, distribution = approximate(nresample = 1000))
>
> psd <- pvalue(it, "step-down") # wasn't monotone
> stopifnot(psd[1] == psd[2])
>
> ### single-step p-values were too small
> df <- data.frame(y1 = c(6, 7, 8, 5, 4, 3, 1, 2),
+ y2 = c(1, 2, 5, 4, 7, 3, 8, 6),
+ y3 = c(5, 7, 8, 6, 2, 3, 1, 4),
+ y4 = c(4, 8, 7, 3, 6, 5, 1, 2),
+ x = gl(2, 4, labels = c("I", "II")))
>
> set.seed(711109)
> it <- independence_test(y1 + y2 + y3 + y4 ~ x, data = df,
+ alternative = "greater",
+ distribution = approximate(nresample = 20))
>
> pss <- pvalue(it, "single-step")
> psd <- pvalue(it, "step-down")
> stopifnot(isequal(all(pss %GE% psd), TRUE))
>
> ### fmaxstat_trafo 'drop'ed its dimensions
> fmaxstat_trafo(gl(2, 2))
{1} vs. {2}
1 1
2 1
3 0
4 0
>
> ### fmaxstat_trafo didn't drop unused levels
> a <- gl(4, 2)
> a[5:6] <- NA
> fmaxstat_trafo(a)
{1} vs. {2, 4} {1, 2} vs. {4} {1, 4} vs. {2}
1 1 1 1
2 1 1 1
3 0 1 0
4 0 1 0
5 NA NA NA
6 NA NA NA
7 0 0 1
8 0 0 1
>
> ### wrong p-value in the one-sided case
> median_test(y1 ~ x, data = df, alternative = "less")
Asymptotic Two-Sample Brown-Mood Median Test
data: y1 by x (I, II)
Z = 2.6458, p-value = 0.9959
alternative hypothesis: true mu is less than 0
>
> ### nullvalue never got printed
> logrank_test(Surv(time, event) ~ stadium, data = ocarcinoma)
Asymptotic Two-Sample Logrank Test
data: Surv(time, event) by stadium (II, IIA)
Z = 2.3373, p-value = 0.01942
alternative hypothesis: true theta is not equal to 1
>
> ### partial matching of the scores argument didn't work
> chisq_test(as.table(jobsatisfaction[, , "Female"]), sco = list(Income = 1:4))
Asymptotic Generalized Pearson Chi-Squared Test
data: Job.Satisfaction by
Income (<5000 < 5000-15000 < 15000-25000 < >25000)
chi-squared = 3.0171, df = 3, p-value = 0.389
>
> ### partial matching of the scores argument didn't work
> tab <- as.table(matrix(c(1, 2, 3, 1, 2, 3, 1, 2, 3), ncol = 3))
> mh_test(tab, sco = list(response = 1:3))
Asymptotic Marginal Homogeneity Test for Ordered Data
data: response (ordered) by
conditions (Var1, Var2)
stratified by block
Z = 1.2247, p-value = 0.2207
alternative hypothesis: two.sided
>
> ### erroneously claimed to be linear-by-linear tests
> chisq_test(as.table(jobsatisfaction[, , "Female"]), scores = list(Income = 1:4))
Asymptotic Generalized Pearson Chi-Squared Test
data: Job.Satisfaction by
Income (<5000 < 5000-15000 < 15000-25000 < >25000)
chi-squared = 3.0171, df = 3, p-value = 0.389
> cmh_test(as.table(jobsatisfaction[, , "Female"]), scores = list(Income = 1:4))
Asymptotic Generalized Cochran-Mantel-Haenszel Test
data: Job.Satisfaction by
Income (<5000 < 5000-15000 < 15000-25000 < >25000)
chi-squared = 2.97, df = 3, p-value = 0.3963
>
> ### multivariate trafos with blocks failed for ordered factors and survival data
> z <- gl(2, 10)
> trafo(data.frame(gl(4, 5, ordered = TRUE)),
+ ordered_trafo = function(x) cbind(c(1, 2, 3, 4)[x], c(1, 2, 3, 5)[x]),
+ block = z)
[1,] 1 1
[2,] 1 1
[3,] 1 1
[4,] 1 1
[5,] 1 1
[6,] 2 2
[7,] 2 2
[8,] 2 2
[9,] 2 2
[10,] 2 2
[11,] 3 3
[12,] 3 3
[13,] 3 3
[14,] 3 3
[15,] 3 3
[16,] 4 5
[17,] 4 5
[18,] 4 5
[19,] 4 5
[20,] 4 5
attr(,"assign")
[1] 1 1
>
> ### wrong exact p-values for stratified tests when all blocks have length two
> y <- 1:30
> x <- factor(rep(1:2, 15))
> id <- gl(15, 2)
> it <- independence_test(y ~ x | id, distribution = "exact") # Wrong
> wt <- wilcoxsign_test(y ~ x | id, distribution = "exact") # OK! p = 6.104e-5
> wt@distribution@name
[1] "Exact Distribution for Dependent Two-Sample Tests (Streitberg-Roehmel Shift Algorithm)"
> stopifnot(isequal(pvalue(it), pvalue(wt)))
>
> ### chisq_test standardized test statistic was wrong
> ct <- chisq_test(as.table(matrix(1:4, ncol = 2)))
> stopifnot(isequal(statistic(ct), statistic(ct, "standardized")^2))
>
> ### standardized signed-rank statistic had wrong sign
> y1 <- seq(1, 30, 2)
> y2 <- seq(2, 30, 2)
> dta <- stack(list(y1 = y1, y2 = y2))
> dta$block <- factor(rep(seq_along(y1), 2))
>
> wt0 <- wilcox.test(y1, y2, paired = TRUE, exact = FALSE, correct = FALSE,
+ alternative = "greater")
> wt1 <- wilcoxsign_test(y1 ~ y2, alternative = "greater")
> wt2 <- wilcoxsign_test(values ~ ind | block, data = dta,
+ alternative = "greater")
> it <- independence_test(values ~ ind | block, data = dta,
+ alternative = "less")
>
> stopifnot(isequal(wt0$statistic, statistic(wt1, "linear"))) # Was OK
> stopifnot(isequal(wt0$statistic, statistic(wt2, "linear")))
> stopifnot(isequal(statistic(wt1), statistic(wt2)))
> stopifnot(isequal(statistic(it), statistic(wt2)))
>
> ### maxstat_test didn't handle scores properly
> mt0 <- maxstat_test(counts ~ age, data = treepipit)
>
> fage <- factor(treepipit$age) # -> wrong estimates
> mt1 <- maxstat_test(counts ~ fage, data = treepipit,
+ scores = list(fage = 1:4))
> stopifnot(isequal(mt0@estimates$estimate$cutpoint,
+ max(as.numeric(mt1@estimates$estimate$cutpoint))))
>
> oage <- ordered(treepipit$age) # -> error: oage is not a factor
> mt2 <- maxstat_test(counts ~ oage, data = treepipit,
+ scores = list(oage = 1:4))
> stopifnot(isequal(mt0@estimates$estimate$cutpoint,
+ max(as.numeric(mt2@estimates$estimate$cutpoint))))
>
> ### one-sided Ansari-Bradley test reported the wrong direction
> y <- c(rnorm(10, sd = 1), rnorm(10, sd = 5)) # sigma_1 < sigma_2 ==>> "less"
> x <- gl(2, 10)
> alt <- "less"
> at <- ansari_test(y ~ x, alternative = alt)
> stopifnot(isequal(at@statistic@alternative, alt))
>
> ### objects of class "SymmetryProblem" didn't check validity
> dta <- data.frame(y = rnorm(20), y2 = rnorm(20),
+ x = factor(rep(1:4, 5)), x2 = gl(2, 10),
+ b = gl(5, 4),
+ w = rep(2, 20))
> try(friedman_test(y + y2 ~ x | b, data = dta))
Error in check(object) : 'y''y2' is not a numeric variable
> try(friedman_test(y ~ x + x2 | b, data = dta))
Error in validityMethod(object) :
'x' slot does not contain a single factor
> try(friedman_test(y ~ x2 | b, data = dta)) # was ok
Error in validityMethod(object) :
'object' is not a an unreplicated complete block design
>
> ### friedman_test didn't warn on weights
> friedman_test(y ~ x | b, data = dta, weights = ~ w)
Asymptotic Friedman Test
data: y by x (1, 2, 3, 4)
stratified by b
chi-squared = 4.76, df = 3, p-value = 0.1902
Warning message:
In ft("friedman_test", "SymmetryProblem", formula, data, subset, :
rank transformation doesn't take weights into account
>
> ### chisq_test ignored xtrafo and ytrafo
> chisq_test(as.table(jobsatisfaction[, , "Female"]),
+ xtrafo = function(data)
+ trafo(data, factor_trafo = function(x)
+ of_trafo(x, scores = 1:4)))
Asymptotic Pearson Chi-Squared Test
data: Job.Satisfaction by
Income (<5000, 5000-15000, 15000-25000, >25000)
chi-squared = 3.0171, df = 3, p-value = 0.389
Warning message:
In of_trafo(x, scores = 1:4) : 'x' is not an ordered factor
> chisq_test(as.table(jobsatisfaction[, , "Female"]),
+ ytrafo = function(data)
+ trafo(data, factor_trafo = function(y)
+ of_trafo(y, scores = 1:4)))
Asymptotic Pearson Chi-Squared Test
data: Job.Satisfaction by
Income (<5000, 5000-15000, 15000-25000, >25000)
chi-squared = 4.2297, df = 3, p-value = 0.2377
Warning message:
In of_trafo(y, scores = 1:4) : 'y' is not an ordered factor
> chisq_test(as.table(jobsatisfaction[, , "Female"]),
+ xtrafo = function(data)
+ trafo(data, factor_trafo = function(x)
+ of_trafo(x, scores = 1:4)),
+ ytrafo = function(data)
+ trafo(data, factor_trafo = function(y)
+ of_trafo(y, scores = 1:4)))
Asymptotic Pearson Chi-Squared Test
data: Job.Satisfaction by
Income (<5000, 5000-15000, 15000-25000, >25000)
chi-squared = 1.8684, df = 1, p-value = 0.1717
Warning messages:
1: In of_trafo(x, scores = 1:4) : 'x' is not an ordered factor
2: In of_trafo(y, scores = 1:4) : 'y' is not an ordered factor
>
> ### dperm could fail for *exact* tests with blocks
> ### (this was due to the support values not being ordered and distinct)
> dta <- data.frame(
+ y = c(1.83, 0.50, 1.62, 2.48, 1.68, 1.88, 1.55, 3.06, 1.30,
+ 0.878, 0.647, 0.598, 2.05, 1.06, 1.29, 1.06, 3.14, 1.29),
+ x = gl(2, 9),
+ b = factor(rep(seq_len(9), 2)))
> it <- independence_test(y ~ x | b, data = dta,
+ distribution = exact(algorithm = "shift"),
+ alternative = "greater")
> stopifnot(is.numeric(dperm(it, support(it))))
> ### see 'regtest_distribution.R' for more extensive checks
>
> ### qperm with p = 1 could be NA for *exact* tests using the shift algorithm
> TeaTasting <-
+ matrix(c(3, 1, 1, 3),
+ nrow = 2,
+ dimnames = list(Guess = c("Milk", "Tea"),
+ Truth = c("Milk", "Tea")))
> it <- independence_test(as.table(TeaTasting),
+ distribution = exact(algorithm = "shift"))
> stopifnot(!is.na(qperm(it, p = 1)))
>
> ### dperm for *exact* tests returned a zero-length vector for values not
> ### included in the support
> dp_it <- dperm(it, 1.5)
> stopifnot(length(dp_it > 0) && dp_it == 0)
>
> ### dperm for *approximate* tests returned non-zero probabilities for values not
> ### included in the support
> exfoliative <- matrix(c( 0, 16,
+ 15, 57),
+ nrow = 2, byrow = TRUE)
> set.seed(290875)
> it <- independence_test(as.table(exfoliative),
+ distribution = approximate(nresample = 10000),
+ teststat = "scalar")
> stopifnot(isequal(round(dperm(it, -statistic(it)), 4), 0.0000)) # 0.0747
>
> ### 'is_2sample' didn't drop unused levels, causing trouble with, e.g., subset
> dta <- data.frame(y = rnorm(15), x = gl(3, 5), b = factor(rep(1:5, 3)))
> subs <- dta$x %in% 1:2
> wilcox_test(y ~ x | b, data = dta, subset = subs)
Asymptotic Wilcoxon-Mann-Whitney Test
data: y by x (1, 2)
stratified by b
Z = -0.46625, p-value = 0.641
alternative hypothesis: true mu is not equal to 0
>
> ### problem with subsetting stratification variable
> subs <- dta$x %in% 1:2 & dta$b %in% 1:4
> wilcox_test(y ~ x | b, data = dta, subset = subs)
Asymptotic Wilcoxon-Mann-Whitney Test
data: y by x (1, 2)
stratified by b
Z = -0.52523, p-value = 0.5994
alternative hypothesis: true mu is not equal to 0
>
> ### 'dperm' returned non-sense for asymptotic max-type tests
> y1 <- rnorm(10)
> y2 <- rnorm(10)
> x <- gl(2, 5)
> it <- independence_test(y1 + y2 ~ x)
> stopifnot(is.na(dperm(it, statistic(it))))
>
> ### 'p-'/'qperm' for asymptotic max-type test had issues with vector arguments
> stopifnot(isequal(pperm(it, 1:3),
+ c(pperm(it, 1), pperm(it, 2), pperm(it, 3))))
> stopifnot(isequal(qperm(it, c(0.9, 0.95, 0.99)),
+ c(qperm(it, 0.9), qperm(it, 0.95), qperm(it, 0.99))))
>
> ### could not distinguish censored and numeric responses
> y1 <- rnorm(10)
> y2 <- rnorm(10)
> x <- gl(2, 5)
> b <- factor(rep(1:5, 2))
> try(oneway_test(Surv(y1) ~ x))
Error in check(object) : 'Surv(y1)' is not a numeric variable
> try(wilcox_test(Surv(y1) ~ x))
Error in check(object) : 'Surv(y1)' is not a numeric variable
> try(kruskal_test(Surv(y1) ~ x))
Error in check(object) : 'Surv(y1)' is not a numeric variable
> try(normal_test(Surv(y1) ~ x))
Error in check(object) : 'Surv(y1)' is not a numeric variable
> try(median_test(Surv(y1) ~ x))
Error in check(object) : 'Surv(y1)' is not a numeric variable
> try(savage_test(Surv(y1) ~ x))
Error in check(object) : 'Surv(y1)' is not a numeric variable
> try(kruskal_test(Surv(y1) ~ x))
Error in check(object) : 'Surv(y1)' is not a numeric variable
> try(taha_test(Surv(y1) ~ x))
Error in check(object) : 'Surv(y1)' is not a numeric variable
> try(klotz_test(Surv(y1) ~ x))
Error in check(object) : 'Surv(y1)' is not a numeric variable
> try(mood_test(Surv(y1) ~ x))
Error in check(object) : 'Surv(y1)' is not a numeric variable
> try(ansari_test(Surv(y1) ~ x))
Error in check(object) : 'Surv(y1)' is not a numeric variable
> try(fligner_test(Surv(y1) ~ x))
Error in fligner_test.IndependenceProblem(object = new("IndependenceProblem", :
'Surv(y1)' is not a numeric variable
> try(conover_test(Surv(y1) ~ x))
Error in conover_test.IndependenceProblem(object = new("IndependenceProblem", :
'Surv(y1)' is not a numeric variable
> try(sign_test(Surv(y1) ~ x | b))
Error in sign_test.SymmetryProblem(object = new("SymmetryProblem", x = structure(list( :
'y' is not a numeric variable
> try(sign_test(Surv(y1) ~ Surv(y2)))
Error in sign_test.formula(Surv(y1) ~ Surv(y2)) :
'y' is not a numeric variable
> try(sign_test(Surv(y1) ~ y2))
Error in sign_test.formula(Surv(y1) ~ y2) : 'y' is not a numeric variable
> try(sign_test(y1 ~ Surv(y2)))
Error in sign_test.formula(y1 ~ Surv(y2)) : 'x' is not a numeric variable
> try(wilcoxsign_test(Surv(y1) ~ x | b))
Error in wilcoxsign_test.SymmetryProblem(object = new("SymmetryProblem", :
'y' is not a numeric variable
> try(wilcoxsign_test(Surv(y1) ~ Surv(y2)))
Error in wilcoxsign_test.formula(Surv(y1) ~ Surv(y2)) :
'y' is not a numeric variable
> try(wilcoxsign_test(Surv(y1) ~ y2))
Error in wilcoxsign_test.formula(Surv(y1) ~ y2) :
'y' is not a numeric variable
> try(wilcoxsign_test(y1 ~ Surv(y2)))
Error in wilcoxsign_test.formula(y1 ~ Surv(y2)) :
'x' is not a numeric variable
> try(friedman_test(Surv(y1) ~ x))
Error in check(object) : 'Surv(y1)' is not a numeric variable
> try(quade_test(Surv(y1) ~ x))
Error in quade_test.SymmetryProblem(object = new("SymmetryProblem", x = structure(list( :
'Surv(y1)' is not a numeric variable
>
> ### exact two-sample tests with scores gave wrong p-value
> y <- 1:20
> x <- gl(2, 10)
> ox <- ordered(x)
>
> it1 <- independence_test(y ~ x, distr = exact(algorithm = "shift")) # p = 1e-05
> it2 <- independence_test(y ~ x, distr = exact(algorithm = "shift"), # was p = 1
+ scores = list(x = 1:2))
> it3 <- independence_test(y ~ ox, distr = exact(algorithm = "shift")) # was p = 1
> it4 <- independence_test(y ~ ox, distr = exact(algorithm = "shift"), # was p = NA
+ scores = list(ox = 3:4))
> stopifnot(identical(pvalue(it1), pvalue(it2)))
> stopifnot(identical(pvalue(it1), pvalue(it3)))
> stopifnot(identical(pvalue(it1), pvalue(it4)))
>
> it5 <- independence_test(y ~ x, distr = exact(algorithm = "split")) # p = 1e-05
> it6 <- independence_test(y ~ x, distr = exact(algorithm = "split"), # was p = NA
+ scores = list(x = 1:2))
> it7 <- independence_test(y ~ ox, distr = exact(algorithm = "split")) # was p = NA
> it8 <- independence_test(y ~ ox, distr = exact(algorithm = "split"), # was p = NA
+ scores = list(ox = 3:4))
> stopifnot(identical(pvalue(it5), pvalue(it6)))
> stopifnot(identical(pvalue(it5), pvalue(it7)))
> stopifnot(identical(pvalue(it5), pvalue(it8)))
>
> ### 'of_trafo' threw an error for 'x' of length one
> of_trafo(gl(3, 1, ordered = TRUE)[1])
[,1]
1 1
>
> ### 'setscores' assigned 0:1 for decreasing scores in 2-level cases
> it1 <- independence_test(y ~ x, scores = list(x = 1:2)) # was OK
> it2 <- independence_test(y ~ x, scores = list(x = 2:1)) # wrong sign
> stopifnot(identical(statistic(it1), -statistic(it2)))
>
> ### 'of_trafo' didn't return normalized scores in 2-level cases using 'scores'
> of <- gl(2, 1, ordered = TRUE)
> stopifnot(identical(of_trafo(of), # was OK
+ matrix(c(0, 1), dimnames = list(1:2))))
> stopifnot(identical(of_trafo(of, scores = 1:2), # was 1:2
+ matrix(c(0, 1), dimnames = list(1:2))))
> stopifnot(identical(of_trafo(of, scores = 2:1), # was 2:1
+ matrix(c(1, 0), dimnames = list(1:2))))
>
> ### 'logrank_trafo' didn't make sure input was right-censored
> s <- Surv(1:5, event = c(1, 0, 1, 0, 1), type = "left")
> try(logrank_trafo(s))
Error in logrank_trafo(s) :
's' is not of class "Surv" representing right-censored data
>
> ### 'ofmaxstat_trafo' had the labeling wrong
> of <- ordered(c(1, 1, 2, 3, 3, 4))
> ofmaxstat_trafo(of, minprob = 0.34) # was {1} vs. {2, 3, 4}
{1, 2} vs. {3, 4}
1 1
2 1
3 1
4 0
5 0
6 0
>
> ### 'statistic(*, "standardized")' didn't work for "IndependenceLinearStatistic"
> ils <- new("IndependenceLinearStatistic", it2@statistic)
> statistic(ils, type = "standardized")
-3.779645
>
> ### exact appeared to work for multivariate quadratic two-sample tests
> tab <- as.table(matrix(c(5, 14, 8, 4, 25, 5, 32, 6), nrow = 2))
> try(independence_test(tab, distr = exact(), teststat = "quad"))
Error in .local(object, ...) :
cannot compute exact distribution with multivariate scores
>
> ### partial matching of teststat
> it <- independence_test(y ~ x, test = "quadratic")
>
> proc.time()
user system elapsed
2.75 0.20 2.93
Generated by dwww version 1.15 on Thu May 23 21:00:24 CEST 2024.