R version 2.12.0 (2010-10-15)
Copyright (C) 2010 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i486-pc-linux-gnu (32-bit)

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Type 'license()' or 'licence()' for distribution details.

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Type 'contributors()' for more information and
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Type 'demo()' for some demos, 'help()' for on-line help, or
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> x <- c('Firefox3.0.17'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'MSIE7'
+ ,'Firefox3.0.4'
+ ,'Firefox0'
+ ,'MSIE8'
+ ,'Chrome3.0.195.38'
+ ,'Firefox3.0.17'
+ ,'Firefox0'
+ ,'MSIE7'
+ ,'MSIE7'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'MSIE7'
+ ,'Firefox0'
+ ,'MSIE8'
+ ,'Firefox0'
+ ,'Firefox0'
+ ,'MSIE7'
+ ,'Firefox0'
+ ,'Firefox0'
+ ,'MSIE8'
+ ,'MSIE7'
+ ,'Firefox0'
+ ,'Firefox0'
+ ,'Safari4.0.4'
+ ,'MSIE8'
+ ,'Firefox3.0.17'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'MSIE7'
+ ,'Firefox0'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'Firefox0'
+ ,'MSIE8'
+ ,'MSIE7'
+ ,'MSIE7'
+ ,'Firefox0'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'Firefox0'
+ ,'Opera9.8'
+ ,'Firefox3.0.16'
+ ,'MSIE7'
+ ,'MSIE8'
+ ,'MSIE7'
+ ,'Firefox0'
+ ,'Firefox0'
+ ,'Safari4.0.4'
+ ,'Firefox0'
+ ,'Firefox0'
+ ,'MSIE8'
+ ,'MSIE6'
+ ,'MSIE7'
+ ,'Firefox3.0.16'
+ ,'Safari4.0.3'
+ ,'MSIE7'
+ ,'MSIE7'
+ ,'MSIE6'
+ ,'MSIE7'
+ ,'Firefox3.0.17'
+ ,'MSIE7'
+ ,'Chrome3.0.195.38'
+ ,'MSIE7'
+ ,'Firefox3.0.15'
+ ,'Safari4.0.2'
+ ,'Safari4.0.2'
+ ,'Firefox0'
+ ,'MSIE7'
+ ,'MSIE7'
+ ,'Firefox3.0.17'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'MSIE7'
+ ,'Firefox0'
+ ,'MSIE7'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'Firefox3.0.15'
+ ,'MSIE7'
+ ,'Firefox0'
+ ,'Safari4.0.4'
+ ,'Firefox0'
+ ,'MSIE6'
+ ,'MSIE8'
+ ,'MSIE7'
+ ,'MSIE8'
+ ,'MSIE7'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'Safari0'
+ ,'Firefox0'
+ ,'MSIE8'
+ ,'Firefox3.0.16'
+ ,'MSIE8'
+ ,'MSIE7'
+ ,'MSIE7'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'Firefox3.0.12'
+ ,'MSIE7'
+ ,'Firefox0'
+ ,'MSIE6'
+ ,'MSIE7'
+ ,'MSIE8'
+ ,'Firefox3.0.16'
+ ,'MSIE7'
+ ,'MSIE7'
+ ,'MSIE8'
+ ,'Safari4.0.3'
+ ,'MSIE7'
+ ,'Firefox3.0.15'
+ ,'Firefox0'
+ ,'MSIE8'
+ ,'Safari4.0.3'
+ ,'Safari4.0.2'
+ ,'Firefox0'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'MSIE8'
+ ,'Chrome3.0.195.38'
+ ,'MSIE7'
+ ,'Firefox0'
+ ,'MSIE8'
+ ,'MSIE7'
+ ,'MSIE7'
+ ,'MSIE8'
+ ,'Firefox0'
+ ,'Safari4.0.4'
+ ,'MSIE7'
+ ,'MSIE8'
+ ,'MSIE6'
+ ,'MSIE7')
> ylimmax = ''
> ylimmin = ''
> main = 'Robustness of Central Tendency'
> #'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!)
> geomean <- function(x) {
+ return(exp(mean(log(x))))
+ }
> harmean <- function(x) {
+ return(1/mean(1/x))
+ }
> quamean <- function(x) {
+ return(sqrt(mean(x*x)))
+ }
> winmean <- function(x) {
+ x <-sort(x[!is.na(x)])
+ n<-length(x)
+ denom <- 3
+ nodenom <- n/denom
+ if (nodenom>40) denom <- n/40
+ sqrtn = sqrt(n)
+ roundnodenom = floor(nodenom)
+ win <- array(NA,dim=c(roundnodenom,2))
+ for (j in 1:roundnodenom) {
+ win[j,1] <- (j*x[j+1]+sum(x[(j+1):(n-j)])+j*x[n-j])/n
+ win[j,2] <- sd(c(rep(x[j+1],j),x[(j+1):(n-j)],rep(x[n-j],j)))/sqrtn
+ }
+ return(win)
+ }
> trimean <- function(x) {
+ x <-sort(x[!is.na(x)])
+ n<-length(x)
+ denom <- 3
+ nodenom <- n/denom
+ if (nodenom>40) denom <- n/40
+ sqrtn = sqrt(n)
+ roundnodenom = floor(nodenom)
+ tri <- array(NA,dim=c(roundnodenom,2))
+ for (j in 1:roundnodenom) {
+ tri[j,1] <- mean(x,trim=j/n)
+ tri[j,2] <- sd(x[(j+1):(n-j)]) / sqrt(n-j*2)
+ }
+ return(tri)
+ }
> midrange <- function(x) {
+ return((max(x)+min(x))/2)
+ }
> q1 <- function(data,n,p,i,f) {
+ np <- n*p;
+ i <<- floor(np)
+ f <<- np - i
+ qvalue <- (1-f)*data[i] + f*data[i+1]
+ }
> q2 <- function(data,n,p,i,f) {
+ np <- (n+1)*p
+ i <<- floor(np)
+ f <<- np - i
+ qvalue <- (1-f)*data[i] + f*data[i+1]
+ }
> q3 <- function(data,n,p,i,f) {
+ np <- n*p
+ i <<- floor(np)
+ f <<- np - i
+ if (f==0) {
+ qvalue <- data[i]
+ } else {
+ qvalue <- data[i+1]
+ }
+ }
> q4 <- function(data,n,p,i,f) {
+ np <- n*p
+ i <<- floor(np)
+ f <<- np - i
+ if (f==0) {
+ qvalue <- (data[i]+data[i+1])/2
+ } else {
+ qvalue <- data[i+1]
+ }
+ }
> q5 <- function(data,n,p,i,f) {
+ np <- (n-1)*p
+ i <<- floor(np)
+ f <<- np - i
+ if (f==0) {
+ qvalue <- data[i+1]
+ } else {
+ qvalue <- data[i+1] + f*(data[i+2]-data[i+1])
+ }
+ }
> q6 <- function(data,n,p,i,f) {
+ np <- n*p+0.5
+ i <<- floor(np)
+ f <<- np - i
+ qvalue <- data[i]
+ }
> q7 <- function(data,n,p,i,f) {
+ np <- (n+1)*p
+ i <<- floor(np)
+ f <<- np - i
+ if (f==0) {
+ qvalue <- data[i]
+ } else {
+ qvalue <- f*data[i] + (1-f)*data[i+1]
+ }
+ }
> q8 <- function(data,n,p,i,f) {
+ np <- (n+1)*p
+ i <<- floor(np)
+ f <<- np - i
+ if (f==0) {
+ qvalue <- data[i]
+ } else {
+ if (f == 0.5) {
+ qvalue <- (data[i]+data[i+1])/2
+ } else {
+ if (f < 0.5) {
+ qvalue <- data[i]
+ } else {
+ qvalue <- data[i+1]
+ }
+ }
+ }
+ }
> midmean <- function(x,def) {
+ x <-sort(x[!is.na(x)])
+ n<-length(x)
+ if (def==1) {
+ qvalue1 <- q1(x,n,0.25,i,f)
+ qvalue3 <- q1(x,n,0.75,i,f)
+ }
+ if (def==2) {
+ qvalue1 <- q2(x,n,0.25,i,f)
+ qvalue3 <- q2(x,n,0.75,i,f)
+ }
+ if (def==3) {
+ qvalue1 <- q3(x,n,0.25,i,f)
+ qvalue3 <- q3(x,n,0.75,i,f)
+ }
+ if (def==4) {
+ qvalue1 <- q4(x,n,0.25,i,f)
+ qvalue3 <- q4(x,n,0.75,i,f)
+ }
+ if (def==5) {
+ qvalue1 <- q5(x,n,0.25,i,f)
+ qvalue3 <- q5(x,n,0.75,i,f)
+ }
+ if (def==6) {
+ qvalue1 <- q6(x,n,0.25,i,f)
+ qvalue3 <- q6(x,n,0.75,i,f)
+ }
+ if (def==7) {
+ qvalue1 <- q7(x,n,0.25,i,f)
+ qvalue3 <- q7(x,n,0.75,i,f)
+ }
+ if (def==8) {
+ qvalue1 <- q8(x,n,0.25,i,f)
+ qvalue3 <- q8(x,n,0.75,i,f)
+ }
+ midm <- 0
+ myn <- 0
+ roundno4 <- round(n/4)
+ round3no4 <- round(3*n/4)
+ for (i in 1:n) {
+ if ((x[i]>=qvalue1) & (x[i]<=qvalue3)){
+ midm = midm + x[i]
+ myn = myn + 1
+ }
+ }
+ midm = midm / myn
+ return(midm)
+ }
> (arm <- mean(x))
[1] NA
Warning message:
In mean.default(x) : argument is not numeric or logical: returning NA
> sqrtn <- sqrt(length(x))
> (armse <- sd(x) / sqrtn)
[1] NA
Warning message:
In var(x, na.rm = na.rm) : NAs introduced by coercion
> (armose <- arm / armse)
[1] NA
> (geo <- geomean(x))
Error in log(x) : Non-numeric argument to mathematical function
Calls: geomean -> mean
Execution halted