R Under development (unstable) (2023-10-04 r85267 ucrt) -- "Unsuffered Consequences"
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> library(matrixTests)
> 
> #--- special argument cases ----------------------------------------------------
> 
> # x and y can be vectors
> x <- rnorm(9)
> y <- rnorm(9)
> X <- matrix(x, nrow=1)
> Y <- matrix(y, nrow=1)
> stopifnot(all.equal(row_t_welch(x, y), row_t_welch(X, Y)))
> 
> # x and y can be numeric data frames
> x <- iris[1:50,1:4]
> y <- iris[51:100,1:4]
> X <- as.matrix(x)
> Y <- as.matrix(y)
> stopifnot(all.equal(row_t_welch(x, y), row_t_welch(X, Y)))
> 
> # x and y can have 0 rows
> x <- matrix(0, nrow=0, ncol=4)
> y <- matrix(0, nrow=0, ncol=4)
> stopifnot(all.equal(nrow(row_t_welch(x, y)), 0))
> 
> # x and y can have 0 rows and 0 columns
> x <- matrix(0, nrow=0, ncol=0)
> y <- matrix(0, nrow=0, ncol=0)
> stopifnot(all.equal(nrow(row_t_welch(x, y)), 0))
> 
> # alternative values can be partially completed
> x <- rnorm(5)
> y <- rnorm(5)
> stopifnot(all.equal(row_t_welch(x, y, alternative="greater"), row_t_welch(x, y, alternative="g")))
> 
> # null can be +Inf
> x <- rnorm(5)
> y <- rnorm(5)
> res <- row_t_welch(x, y, null=Inf)
> stopifnot(all.equal(res$pvalue, 0))
> stopifnot(all.equal(res$statistic, -Inf))
> 
> # null can be -Inf
> x <- rnorm(5)
> y <- rnorm(5)
> res <- row_t_welch(x, y, null=-Inf)
> stopifnot(all.equal(res$pvalue, 0))
> stopifnot(all.equal(res$statistic, Inf))
> 
> # conf.level can be 0
> x <- rnorm(5)
> y <- rnorm(5)
> res <- row_t_welch(x, y, conf.level=0)
> stopifnot(all.equal(res$conf.low, res$conf.high))
> 
> # conf.level can be 1
> x <- rnorm(5)
> y <- rnorm(5)
> res <- row_t_welch(x, y, conf.level=1)
> stopifnot(all.equal(res$conf.low, -Inf))
> stopifnot(all.equal(res$conf.high, Inf))
> 
> # conf.level can be NA
> x <- rnorm(5)
> y <- rnorm(5)
> res <- row_t_welch(x, y, conf.level=NA)
> stopifnot(all.equal(res$conf.level, NA_real_))
> stopifnot(all.equal(res$conf.low, NA_real_))
> stopifnot(all.equal(res$conf.high, NA_real_))
> 
> 
> #--- recycling -----------------------------------------------------------------
> 
> # y can be a vector when x is a matrix
> x <- matrix(rnorm(10), nrow=2)
> y <- 1:5
> res1 <- row_t_welch(x, y)
> res2 <- row_t_welch(x, rbind(y,y))
> stopifnot(all.equal(res1, res2))
> 
> # null can be specified for each row
> x <- matrix(rnorm(10), nrow=2)
> y <- matrix(rnorm(10), nrow=2)
> res1 <- row_t_welch(x, y, null=2)
> res2 <- row_t_welch(x, y, null=c(2,2))
> stopifnot(all.equal(res1, res2))
> 
> # alternative can be specified for each row
> x <- matrix(rnorm(10), nrow=2)
> y <- matrix(rnorm(10), nrow=2)
> res1 <- row_t_welch(x, y, alternative="g")
> res2 <- row_t_welch(x, y, alternative=c("g","g"))
> stopifnot(all.equal(res1, res2))
> 
> # conf.level can be specified for each row
> x <- matrix(rnorm(10), nrow=2)
> y <- matrix(rnorm(10), nrow=2)
> res1 <- row_t_welch(x, y, conf.level=0.98)
> res2 <- row_t_welch(x, y, conf.level=c(0.98,0.98))
> stopifnot(all.equal(res1, res2))
> 
> 
> #--- missing values ------------------------------------------------------------
> 
> # missing values in x are removed
> x <- c(NA,NA,rnorm(7),NA)
> y <- rnorm(10)
> res1 <- row_t_welch(x, y)
> res2 <- row_t_welch(x[!is.na(x)], y)
> stopifnot(all.equal(res1, res2))
> 
> # missing values in y are removed
> x <- rnorm(10)
> y <- c(NA,NA,rnorm(7),NA)
> res1 <- row_t_welch(x, y)
> res2 <- row_t_welch(x, y[!is.na(y)])
> stopifnot(all.equal(res1, res2))
> 
> # missing values from both x and y are removed
> x <- c(NA,NA,rnorm(7),NA)
> y <- c(NA,rnorm(7),NA,NA)
> res1 <- row_t_welch(x, y)
> res2 <- row_t_welch(x[!is.na(x)], y[!is.na(y)])
> stopifnot(all.equal(res1, res2))
> 
> # no difference between NA and NaN
> x1 <- c(NA,NA,1,2,1:5,NA)
> x2 <- c(NaN,NaN,1,2,1:5,NaN)
> y1 <- c(NA,NA,8:2,NA)
> y2 <- c(NaN,NaN,8:2,NaN)
> res1 <- row_t_welch(x1, y1)
> res2 <- row_t_welch(x2, y2)
> stopifnot(all.equal(res1, res2))
> 
> # everything can be NA
> x <- rep(NA_integer_, 4)
> y <- rep(NA_integer_, 4)
> res <- suppressWarnings(row_t_welch(x, y))
> stopifnot(all.equal(res$obs.tot, 0))
> 
> 
> #--- rownames ------------------------------------------------------------------
> 
> # when not provided - numbers are used instead.
> x <- matrix(rnorm(20), nrow=2)
> y <- matrix(rnorm(20), nrow=2)
> res <- row_t_welch(x, y)
> stopifnot(all.equal(rownames(res), c("1", "2")))
> 
> # when not provided - not taken from y
> x <- matrix(rnorm(20), nrow=2)
> y <- matrix(rnorm(20), nrow=2, dimnames=list(c("A", "B")))
> res <- row_t_welch(x, y)
> stopifnot(all.equal(rownames(res), c("1","2")))
> 
> # when provided - preserved (matrix)
> x <- matrix(rnorm(20), nrow=2, dimnames=list(c("A", "B")))
> y <- matrix(rnorm(20), nrow=2)
> res <- row_t_welch(x, y)
> stopifnot(all.equal(rownames(res), rownames(x)))
> 
> # when provided - preserved (data.frame)
> x <- data.frame(matrix(rnorm(20), nrow=2, dimnames=list(c("A", "B"))))
> y <- matrix(rnorm(20), nrow=2)
> res <- row_t_welch(x, y)
> stopifnot(all.equal(rownames(res), rownames(x)))
> 
> # when duplicated - made unique
> x <- matrix(rnorm(20), nrow=4, dimnames=list(c("A", "A", "B", "B")))
> y <- matrix(rnorm(20), nrow=4)
> res <- row_t_welch(x, y)
> stopifnot(all.equal(rownames(res), make.unique(rownames(x))))
> 
> 
> proc.time()
   user  system elapsed 
   0.15    0.07    0.21