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Type 'q()' to quit R. > x <- c(8.55,8.56,8.57,8.59,8.61,8.62,8.62,8.63,8.71,8.72,8.74,8.75,8.79,8.82,8.82,8.84,8.86,8.86,8.85,8.86,8.86,8.87,8.88,8.9,8.91,8.96,8.98,8.99,9,9,9,9.01,9.01,8.99,8.99,8.99,9,9,9.02,9.05,9.05,9.05,9.06,9.06,9.08,9.07,9.06,9.08,9.07,9.11,9.15,9.15,9.17,9.2,9.23,9.26,9.27,9.28,9.29,9.29,9.11,9.06,9.11,9.13,9.13,9.19,9.2,9.23,9.24,9.28,9.32,9.32,9.32,9.36,9.37,9.38,9.41,9.44,9.44,9.44,9.47,9.48,9.56,9.58,9.56,9.58,9.7,9.74,9.76,9.78,9.84,9.88,9.96,9.97,9.96,9.96) > par1 = '200' > par1 <- as.numeric(par1) > if (par1 < 10) par1 = 10 > if (par1 > 5000) par1 = 5000 > library(lattice) > library(boot) Attaching package: 'boot' The following object(s) are masked from package:lattice : melanoma > boot.stat <- function(s,i) + { + s.mean <- mean(s[i]) + s.median <- median(s[i]) + s.midrange <- (max(s[i]) + min(s[i])) / 2 + c(s.mean, s.median, s.midrange) + } > (r <- boot(x,boot.stat, R=par1, stype='i')) ORDINARY NONPARAMETRIC BOOTSTRAP Call: boot(data = x, statistic = boot.stat, R = par1, stype = "i") Bootstrap Statistics : original bias std. error t1* 9.146042 0.000515625 0.036572282 t2* 9.075000 0.010825000 0.036363524 t3* 9.260000 0.000725000 0.008482875 > postscript(file="/var/www/html/rcomp/tmp/1eomd1260727790.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > plot(r$t[,1],type='p',ylab='simulated values',main='Simulation of Mean') > grid() > dev.off() null device 1 > postscript(file="/var/www/html/rcomp/tmp/2ub8s1260727790.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > plot(r$t[,2],type='p',ylab='simulated values',main='Simulation of Median') > grid() > dev.off() null device 1 > postscript(file="/var/www/html/rcomp/tmp/3gj3p1260727790.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > plot(r$t[,3],type='p',ylab='simulated values',main='Simulation of Midrange') > grid() > dev.off() null device 1 > postscript(file="/var/www/html/rcomp/tmp/4ipzn1260727790.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > densityplot(~r$t[,1],col='black',main='Density Plot',xlab='mean') > dev.off() null device 1 > postscript(file="/var/www/html/rcomp/tmp/51h301260727790.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > densityplot(~r$t[,2],col='black',main='Density Plot',xlab='median') > dev.off() null device 1 > postscript(file="/var/www/html/rcomp/tmp/6royy1260727790.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > densityplot(~r$t[,3],col='black',main='Density Plot',xlab='midrange') > dev.off() null device 1 > z <- data.frame(cbind(r$t[,1],r$t[,2],r$t[,3])) > colnames(z) <- list('mean','median','midrange') > postscript(file="/var/www/html/rcomp/tmp/7s4aj1260727790.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > boxplot(z,notch=TRUE,ylab='simulated values',main='Bootstrap Simulation - Central Tendency') Warning message: In bxp(list(stats = c(9.0628125, 9.12052083333333, 9.14723958333333, : some notches went outside hinges ('box'): maybe set notch=FALSE > grid() > dev.off() null device 1 > > #Note: the /var/www/html/rcomp/createtable file can be downloaded at http://www.wessa.net/cretab > load(file="/var/www/html/rcomp/createtable") > > a<-table.start() > a<-table.row.start(a) > a<-table.element(a,'Estimation Results of Bootstrap',6,TRUE) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,'statistic',header=TRUE) > a<-table.element(a,'Q1',header=TRUE) > a<-table.element(a,'Estimate',header=TRUE) > a<-table.element(a,'Q3',header=TRUE) > a<-table.element(a,'S.D.',header=TRUE) > a<-table.element(a,'IQR',header=TRUE) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,'mean',header=TRUE) > q1 <- quantile(r$t[,1],0.25)[[1]] > q3 <- quantile(r$t[,1],0.75)[[1]] > a<-table.element(a,q1) > a<-table.element(a,r$t0[1]) > a<-table.element(a,q3) > a<-table.element(a,sqrt(var(r$t[,1]))) > a<-table.element(a,q3-q1) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,'median',header=TRUE) > q1 <- quantile(r$t[,2],0.25)[[1]] > q3 <- quantile(r$t[,2],0.75)[[1]] > a<-table.element(a,q1) > a<-table.element(a,r$t0[2]) > a<-table.element(a,q3) > a<-table.element(a,sqrt(var(r$t[,2]))) > a<-table.element(a,q3-q1) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,'midrange',header=TRUE) > q1 <- quantile(r$t[,3],0.25)[[1]] > q3 <- quantile(r$t[,3],0.75)[[1]] > a<-table.element(a,q1) > a<-table.element(a,r$t0[3]) > a<-table.element(a,q3) > a<-table.element(a,sqrt(var(r$t[,3]))) > a<-table.element(a,q3-q1) > a<-table.row.end(a) > a<-table.end(a) > table.save(a,file="/var/www/html/rcomp/tmp/8zvhr1260727790.tab") > > try(system("convert tmp/1eomd1260727790.ps tmp/1eomd1260727790.png",intern=TRUE)) character(0) > try(system("convert tmp/2ub8s1260727790.ps tmp/2ub8s1260727790.png",intern=TRUE)) character(0) > try(system("convert tmp/3gj3p1260727790.ps tmp/3gj3p1260727790.png",intern=TRUE)) character(0) > try(system("convert tmp/4ipzn1260727790.ps tmp/4ipzn1260727790.png",intern=TRUE)) character(0) > try(system("convert tmp/51h301260727790.ps tmp/51h301260727790.png",intern=TRUE)) character(0) > try(system("convert tmp/6royy1260727790.ps tmp/6royy1260727790.png",intern=TRUE)) character(0) > try(system("convert tmp/7s4aj1260727790.ps tmp/7s4aj1260727790.png",intern=TRUE)) character(0) > > > proc.time() user system elapsed 1.697 1.067 2.326