R version 2.9.0 (2009-04-17)
Copyright (C) 2009 The R Foundation for Statistical Computing
ISBN 3-900051-07-0

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> x <- c(8357,7454,8076,7248,7339,7292,7359,7537,7441,8057,8037,8257,8692,8119,8236,7432,7669,7453,7566,7731,7657,8130,8401,8737,9009,7919,8228,7903,7912,7857,7965,8091,8024,8772,8656,8953,9014,8103,8876,8231,8173,8087,8296,8007,8382,9168,9137,9321,9234,8451,9101,8279,8284,8225,8597,8305,8620,9102,9258,9652,9522,8874,9415,8525,8862,8421,8626,8750,8852,9412,9570,9513,9986,8907,9663,8799,8931,8732,8936,9127,9070,9773,9670,9929,10095,9025,9659,8954,9022,8855,9034,9196,9038,9650,9715,10052,10436,9314,9717,8997,9062,8885,9058,9095,9149,9857,9848,10269,10341,9690,10125,9349,9224,9224,9454,9347,9430,9933,10148,10677,10735,9760,10567,9333,9409,9502,9348,9319,9594,10160,10182,10810,11105,9874,10958,9311,9610,9398,9784,9425,9557,10166,10337,10770,11265,10183,10941,9628,9709,9637,9579,9741,9754,10508,10749,11079,11608,10668,10933,9703,9799,9656,9648,9712,9766,10540,10564,10911,11218,10230,10410,9227,9378,9105,9128)
> par1 = '50'
> #'GNU S' R Code compiled by R2WASP v. 1.0.44 ()
> #Author: Prof. Dr. P. Wessa
> #To cite this work: AUTHOR(S), (YEAR), YOUR SOFTWARE TITLE (vNUMBER) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/rwasp_YOURPAGE.wasp/
> #Source of accompanying publication: Office for Research, Development, and Education
> #Technical description: Write here your technical program description (don't use hard returns!)
> 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* 9212.851   8.181714    61.78618
t2* 9227.000  30.740000    69.86308
t3* 9428.000 -52.450000    93.56833
> postscript(file="/var/www/html/rcomp/tmp/1guq01260992759.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> plot(r$t[,1],type='p',ylab='simulated values',main='Simulation of Mean')
> grid()
> dev.off()
null device 
          1 
> postscript(file="/var/www/html/rcomp/tmp/2kooe1260992759.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> plot(r$t[,2],type='p',ylab='simulated values',main='Simulation of Median')
> grid()
> dev.off()
null device 
          1 
> postscript(file="/var/www/html/rcomp/tmp/3n3b91260992759.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> plot(r$t[,3],type='p',ylab='simulated values',main='Simulation of Midrange')
> grid()
> dev.off()
null device 
          1 
> postscript(file="/var/www/html/rcomp/tmp/4if181260992759.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> densityplot(~r$t[,1],col='black',main='Density Plot',xlab='mean')
> dev.off()
null device 
          1 
> postscript(file="/var/www/html/rcomp/tmp/5yq8s1260992759.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> densityplot(~r$t[,2],col='black',main='Density Plot',xlab='median')
> dev.off()
null device 
          1 
> postscript(file="/var/www/html/rcomp/tmp/6c0do1260992759.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> densityplot(~r$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$t[,3]))
> colnames(z) <- list('mean','median','midrange')
> postscript(file="/var/www/html/rcomp/tmp/7hwrm1260992759.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> boxplot(z,notch=TRUE,ylab='simulated values',main='Bootstrap Simulation - Central Tendency')
Warning message:
In bxp(list(stats = c(9073.7142857143, 9184.65714285714, 9223.23142857143,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> grid()
> dev.off()
null device 
          1 
> 
> #Note: the /var/www/html/rcomp/createtable file can be downloaded at http://www.wessa.net/cretab
> load(file="/var/www/html/rcomp/createtable")
> 
> a<-table.start()
> a<-table.row.start(a)
> a<-table.element(a,'Estimation Results of Bootstrap',6,TRUE)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'statistic',header=TRUE)
> a<-table.element(a,'Q1',header=TRUE)
> a<-table.element(a,'Estimate',header=TRUE)
> a<-table.element(a,'Q3',header=TRUE)
> a<-table.element(a,'S.D.',header=TRUE)
> a<-table.element(a,'IQR',header=TRUE)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'mean',header=TRUE)
> q1 <- quantile(r$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/8oimh1260992759.tab") 
> 
> try(system("convert tmp/1guq01260992759.ps tmp/1guq01260992759.png",intern=TRUE))
character(0)
> try(system("convert tmp/2kooe1260992759.ps tmp/2kooe1260992759.png",intern=TRUE))
character(0)
> try(system("convert tmp/3n3b91260992759.ps tmp/3n3b91260992759.png",intern=TRUE))
character(0)
> try(system("convert tmp/4if181260992759.ps tmp/4if181260992759.png",intern=TRUE))
character(0)
> try(system("convert tmp/5yq8s1260992759.ps tmp/5yq8s1260992759.png",intern=TRUE))
character(0)
> try(system("convert tmp/6c0do1260992759.ps tmp/6c0do1260992759.png",intern=TRUE))
character(0)
> try(system("convert tmp/7hwrm1260992759.ps tmp/7hwrm1260992759.png",intern=TRUE))
character(0)
> 
> 
> proc.time()
   user  system elapsed 
  1.639   1.015   2.154