R version 2.15.2 (2012-10-26) -- "Trick or Treat"
Copyright (C) 2012 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i686-pc-linux-gnu (32-bit)

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> x <- c(4.27,4.06,4.58,3.23,3.65,3.45,3.03,2.11,1.7,2,1.8,1.59,-0.2,0.3,1.5,-0.1,0.2,-0.1,-0.3,-0.6,0.1,0.6,0.31,-0.1)
> par1 = '4'
> par1 <- as.numeric(par1)
> (n <- length(x))
[1] 24
> (np <- floor(n / par1))
[1] 6
> arr <- array(NA,dim=c(par1,np+1))
> darr <- array(NA,dim=c(par1,np+1))
> ari <- array(0,dim=par1)
> dx <- diff(x)
> j <- 0
> for (i in 1:n)
+ {
+ j = j + 1
+ ari[j] = ari[j] + 1
+ arr[j,ari[j]] <- x[i]
+ darr[j,ari[j]] <- dx[i]
+ if (j == par1) j = 0
+ }
> ari
[1] 6 6 6 6
> arr
     [,1] [,2] [,3] [,4] [,5]  [,6] [,7]
[1,] 4.27 3.65 1.70 -0.2  0.2  0.10   NA
[2,] 4.06 3.45 2.00  0.3 -0.1  0.60   NA
[3,] 4.58 3.03 1.80  1.5 -0.3  0.31   NA
[4,] 3.23 2.11 1.59 -0.1 -0.6 -0.10   NA
> darr
      [,1]  [,2]  [,3] [,4] [,5]  [,6] [,7]
[1,] -0.21 -0.20  0.30  0.5 -0.3  0.50   NA
[2,]  0.52 -0.42 -0.20  1.2 -0.2 -0.29   NA
[3,] -1.35 -0.92 -0.21 -1.6 -0.3 -0.41   NA
[4,]  0.42 -0.41 -1.79  0.3  0.7    NA   NA
> arr.mean <- array(NA,dim=par1)
> arr.median <- array(NA,dim=par1)
> arr.midrange <- array(NA,dim=par1)
> for (j in 1:par1)
+ {
+ arr.mean[j] <- mean(arr[j,],na.rm=TRUE)
+ arr.median[j] <- median(arr[j,],na.rm=TRUE)
+ arr.midrange[j] <- (quantile(arr[j,],0.75,na.rm=TRUE) + quantile(arr[j,],0.25,na.rm=TRUE)) / 2
+ }
> overall.mean <- mean(x)
> overall.median <- median(x)
> overall.midrange <- (quantile(x,0.75) + quantile(x,0.25)) / 2
> postscript(file="/var/wessaorg/rcomp/tmp/1eyuz1352846484.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> plot(arr.mean,type='b',ylab='mean',main='Mean Plot',xlab='Periodic Index')
> mtext(paste('#blocks = ',np))
> abline(overall.mean,0)
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/2jm2h1352846484.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> plot(arr.median,type='b',ylab='median',main='Median Plot',xlab='Periodic Index')
> mtext(paste('#blocks = ',np))
> abline(overall.median,0)
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/3zvq11352846484.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> plot(arr.midrange,type='b',ylab='midrange',main='Midrange Plot',xlab='Periodic Index')
> mtext(paste('#blocks = ',np))
> abline(overall.midrange,0)
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/4nzhm1352846484.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> z <- data.frame(t(arr))
> names(z) <- c(1:par1)
> (boxplot(z,notch=TRUE,col='grey',xlab='Periodic Index',ylab='Value',main='Notched Box Plots - Periodic Subseries'))
$stats
      [,1]  [,2]  [,3]   [,4]
[1,] -0.20 -0.10 -0.30 -0.600
[2,]  0.10  0.30  0.31 -0.100
[3,]  0.95  1.30  1.65  0.745
[4,]  3.65  3.45  3.03  2.110
[5,]  4.27  4.06  4.58  3.230

$n
[1] 6 6 6 6

$conf
          [,1]       [,2]       [,3]       [,4]
[1,] -1.339865 -0.7318517 -0.1044879 -0.6805214
[2,]  3.239865  3.3318517  3.4044879  2.1705214

$out
numeric(0)

$group
numeric(0)

$names
[1] "1" "2" "3" "4"

Warning message:
In bxp(list(stats = c(-0.2, 0.1, 0.95, 3.65, 4.27, -0.1, 0.3, 1.3,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/5tev11352846484.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> z <- data.frame(t(darr))
> names(z) <- c(1:par1)
> (boxplot(z,notch=TRUE,col='grey',xlab='Periodic Index',ylab='Value',main='Notched Box Plots - Differenced Periodic Subseries'))
$stats
      [,1]  [,2]   [,3]  [,4]
[1,] -0.30 -0.42 -1.600 -0.41
[2,] -0.21 -0.29 -1.350 -0.41
[3,]  0.05 -0.20 -0.665  0.30
[4,]  0.50  0.52 -0.300  0.42
[5,]  0.50  1.20 -0.210  0.70

$n
[1] 6 6 6 5

$conf
           [,1]       [,2]        [,3]       [,4]
[1,] -0.4079729 -0.7224762 -1.34228391 -0.2864759
[2,]  0.5079729  0.3224762  0.01228391  0.8864759

$out
[1] -1.79

$group
[1] 4

$names
[1] "1" "2" "3" "4"

Warning message:
In bxp(list(stats = c(-0.3, -0.21, 0.0500000000000002, 0.5, 0.5,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/6x3dq1352846484.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> z <- data.frame(arr)
> names(z) <- c(1:np)
> (boxplot(z,notch=TRUE,col='grey',xlab='Block Index',ylab='Value',main='Notched Box Plots - Sequential Blocks'))
$stats
      [,1] [,2]  [,3]  [,4]  [,5]   [,6] [,7]
[1,] 3.230 2.11 1.590 -0.20 -0.60 -0.100   NA
[2,] 3.645 2.57 1.645 -0.15 -0.45  0.000   NA
[3,] 4.165 3.24 1.750  0.10 -0.20  0.205   NA
[4,] 4.425 3.55 1.900  0.90  0.05  0.455   NA
[5,] 4.580 3.65 2.000  1.50  0.20  0.600   NA

$n
[1] 4 4 4 4 4 4 0

$conf
       [,1]   [,2]    [,3]    [,4]   [,5]     [,6] [,7]
[1,] 3.5488 2.4658 1.54855 -0.7295 -0.595 -0.15445   NA
[2,] 4.7812 4.0142 1.95145  0.9295  0.195  0.56445   NA

$out
numeric(0)

$group
numeric(0)

$names
[1] "1" "2" "3" "4" "5" "6" NA 

Warning message:
In bxp(list(stats = c(3.23, 3.645, 4.165, 4.425, 4.58, 2.11, 2.57,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/7k8ot1352846484.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> z <- data.frame(cbind(arr.mean,arr.median,arr.midrange))
> names(z) <- list('mean','median','midrange')
> (boxplot(z,notch=TRUE,col='grey',ylab='Overall Central Tendency',main='Notched Box Plots'))
$stats
         [,1]   [,2]     [,3]
[1,] 1.021667 0.7450 0.940000
[2,] 1.320833 0.8475 1.291875
[3,] 1.669167 1.1250 1.654375
[4,] 1.769167 1.4750 1.698125
[5,] 1.820000 1.6500 1.731250

$n
[1] 4 4 4

$conf
         [,1]     [,2]     [,3]
[1,] 1.314983 0.629275 1.333437
[2,] 2.023350 1.620725 1.975313

$out
numeric(0)

$group
numeric(0)

$names
[1] "mean"     "median"   "midrange"

Warning message:
In bxp(list(stats = c(1.02166666666667, 1.32083333333333, 1.66916666666667,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> 
> try(system("convert tmp/1eyuz1352846484.ps tmp/1eyuz1352846484.png",intern=TRUE))
character(0)
> try(system("convert tmp/2jm2h1352846484.ps tmp/2jm2h1352846484.png",intern=TRUE))
character(0)
> try(system("convert tmp/3zvq11352846484.ps tmp/3zvq11352846484.png",intern=TRUE))
character(0)
> try(system("convert tmp/4nzhm1352846484.ps tmp/4nzhm1352846484.png",intern=TRUE))
character(0)
> try(system("convert tmp/5tev11352846484.ps tmp/5tev11352846484.png",intern=TRUE))
character(0)
> try(system("convert tmp/6x3dq1352846484.ps tmp/6x3dq1352846484.png",intern=TRUE))
character(0)
> try(system("convert tmp/7k8ot1352846484.ps tmp/7k8ot1352846484.png",intern=TRUE))
character(0)
> 
> 
> proc.time()
   user  system elapsed 
  3.725   0.839   4.694