library(robustbase) ## testing functions: source(system.file("xtraR/ex-funs.R", package = "robustbase")) set.seed(152) Nmax <- 12 nn <- length(nset <- c(2:Nmax, 20, 50))## NOTA BENE: n == 1 etc are NOT YET TREATED! Sim <- 2^9 # = 512 sn <- qn <- numeric(Sim) cpu <- numeric(nn) names(cpu) <- as.character(nset) for(n in nset) { nS <- Sim ## if(n < 20) Sim else round(10*Sim/n) cat("\nn = ",n,"\n------\nno.Sim. = ",nS,"\n") cpu[as.character(n)] <- system.time(for(i in 1:nS) { x <- rnorm(n) sn[i] <- Sn0R(x) qn[i] <- Qn0R(x) Sn.x <- Sn(x, const = 1) Qn.x <- Qn(x, const = 1) if(!is.all.equal(Sn.x, sn[i], tol = 1e-5)) cat("i=",i," Sn() != Sn0R(): ", Sn.x, "!=", sn[i],"\n") if(!is.all.equal(Qn.x, qn[i], tol = 1e-5)) cat("i=",i," Qn() != Qn0R(): ", Qn.x, "!=", qn[i],"\n") })[1] cat("Mean and its. std.err; Quartiles of Sn(x_1 .. x_n) and Qn(...):\n") print(c(mean(sn), sd(sn)/sqrt(nS), quantile(sn, p = (1:3)/4))) print(c(mean(qn), sd(qn)/sqrt(nS), quantile(qn, p = (1:3)/4))) } rbind("Time (CPU) used:" = summary(cpu))