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(6.81,6.8,6.8,6.85,6.85,6.85,6.85,6.85,6.85,6.86,6.86,6.88,6.88,6.88,6.91,6.91,6.91,6.91,6.99,6.99,6.99,7.02,7.02,7.05,7.05,7.05,7.05,7.1,7.1,7.1,7.1,7.12,7.13,7.18,7.24,7.24,7.24,7.27,7.27,7.27,7.27,7.3,7.3,7.57,7.76,7.94,7.94,7.96,7.96,7.98,7.99,8,8,8.04,8.04,8.04,8.04,8.04,8.07,8.07,8.07,8.07,8.11,8.11,8.12,8.11,8.13,8.15,8.16,8.2,8.2,8.2)
> par1 = '12'
> par1 <- '12'
> #'GNU S' R Code compiled by R2WASP v. 1.2.291 ()
> #Author: root
> #To cite this work: Wessa P., (2012), Standard Deviation Plot (v1.0.2) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/rwasp_sdplot.wasp/
> #Source of accompanying publication: Office for Research, Development, and Education
> #
> par1 <- as.numeric(par1)
> (n <- length(x))
[1] 72
> (np <- floor(n / par1))
[1] 6
> arr <- array(NA,dim=c(par1,np+1))
> ari <- array(0,dim=par1)
> j <- 0
> for (i in 1:n)
+ {
+ j = j + 1
+ ari[j] = ari[j] + 1
+ arr[j,ari[j]] <- x[i]
+ if (j == par1) j = 0
+ }
> ari
 [1] 6 6 6 6 6 6 6 6 6 6 6 6
> arr
      [,1] [,2] [,3] [,4] [,5] [,6] [,7]
 [1,] 6.81 6.88 7.05 7.24 7.96 8.07   NA
 [2,] 6.80 6.88 7.05 7.27 7.98 8.07   NA
 [3,] 6.80 6.91 7.05 7.27 7.99 8.11   NA
 [4,] 6.85 6.91 7.10 7.27 8.00 8.11   NA
 [5,] 6.85 6.91 7.10 7.27 8.00 8.12   NA
 [6,] 6.85 6.91 7.10 7.30 8.04 8.11   NA
 [7,] 6.85 6.99 7.10 7.30 8.04 8.13   NA
 [8,] 6.85 6.99 7.12 7.57 8.04 8.15   NA
 [9,] 6.85 6.99 7.13 7.76 8.04 8.16   NA
[10,] 6.86 7.02 7.18 7.94 8.04 8.20   NA
[11,] 6.86 7.02 7.24 7.94 8.07 8.20   NA
[12,] 6.88 7.05 7.24 7.96 8.07 8.20   NA
> arr.sd <- array(NA,dim=par1)
> arr.range <- array(NA,dim=par1)
> arr.iqr <- array(NA,dim=par1)
> for (j in 1:par1)
+ {
+ arr.sd[j] <- sqrt(var(arr[j,],na.rm=TRUE))
+ arr.range[j] <- max(arr[j,],na.rm=TRUE) - min(arr[j,],na.rm=TRUE)
+ arr.iqr[j] <- quantile(arr[j,],0.75,na.rm=TRUE) - quantile(arr[j,],0.25,na.rm=TRUE)
+ }
> overall.sd <- sqrt(var(x))
> overall.range <- max(x) - min(x)
> overall.iqr <- quantile(x,0.75) - quantile(x,0.25)
> postscript(file="/var/wessaorg/rcomp/tmp/1bcvt1354186797.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> plot(arr.sd,type='b',ylab='S.D.',main='Standard Deviation Plot',xlab='Periodic Index')
> mtext(paste('# blocks = ',np))
> abline(overall.sd,0)
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/26tkw1354186797.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> plot(arr.range,type='b',ylab='range',main='Range Plot',xlab='Periodic Index')
> mtext(paste('# blocks = ',np))
> abline(overall.range,0)
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/3nvnx1354186797.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> plot(arr.iqr,type='b',ylab='IQR',main='Interquartile Range Plot',xlab='Periodic Index')
> mtext(paste('# blocks = ',np))
> abline(overall.iqr,0)
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/4jw6f1354186797.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]  [,5] [,6] [,7]  [,8]  [,9] [,10] [,11] [,12]
[1,] 6.810 6.80 6.80 6.850 6.850 6.85 6.85 6.850 6.850  6.86  6.86  6.88
[2,] 6.880 6.88 6.91 6.910 6.910 6.91 6.99 6.990 6.990  7.02  7.02  7.05
[3,] 7.145 7.16 7.16 7.185 7.185 7.20 7.20 7.345 7.445  7.56  7.59  7.60
[4,] 7.960 7.98 7.99 8.000 8.000 8.04 8.04 8.040 8.040  8.04  8.07  8.07
[5,] 8.070 8.07 8.11 8.110 8.120 8.11 8.13 8.150 8.160  8.20  8.20  8.20

$n
 [1] 6 6 6 6 6 6 6 6 6 6 6 6

$conf
         [,1]     [,2]     [,3]     [,4]     [,5]     [,6]     [,7]     [,8]
[1,] 6.448365 6.450464 6.463365 6.481915 6.481915 6.471114 6.522716 6.667716
[2,] 7.841635 7.869536 7.856635 7.888085 7.888085 7.928886 7.877284 8.022284
         [,9]    [,10]    [,11]    [,12]
[1,] 6.767716 6.902067 6.912716 6.942067
[2,] 8.122284 8.217933 8.267284 8.257933

$out
numeric(0)

$group
numeric(0)

$names
 [1] "1"  "2"  "3"  "4"  "5"  "6"  "7"  "8"  "9"  "10" "11" "12"

Warning message:
In bxp(list(stats = c(6.81, 6.88, 7.145, 7.96, 8.07, 6.8, 6.88,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/57ljb1354186797.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,] 6.800 6.880 7.050 7.24 7.960 8.070   NA
[2,] 6.830 6.910 7.075 7.27 7.995 8.110   NA
[3,] 6.850 6.950 7.100 7.30 8.040 8.125   NA
[4,] 6.855 7.005 7.155 7.85 8.040 8.180   NA
[5,] 6.880 7.050 7.240 7.96 8.070 8.200   NA

$n
[1] 12 12 12 12 12 12  0

$conf
         [,1]    [,2]     [,3]     [,4]     [,5]     [,6] [,7]
[1,] 6.838597 6.90667 7.063511 7.035458 8.019475 8.093073   NA
[2,] 6.861403 6.99333 7.136489 7.564542 8.060525 8.156927   NA

$out
numeric(0)

$group
numeric(0)

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

Warning message:
In bxp(list(stats = c(6.8, 6.83, 6.85, 6.855, 6.88, 6.88, 6.91,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/6yf2t1354186797.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> z <- data.frame(cbind(arr.sd,arr.range,arr.iqr))
> names(z) <- list('S.D.','Range','IQR')
> (boxplot(z,notch=TRUE,col='grey',ylab='Overall Variability',main='Notched Box Plots'))
$stats
          [,1]  [,2]    [,3]
[1,] 0.5484068 1.260 0.83750
[2,] 0.5511101 1.265 0.86000
[3,] 0.5558417 1.290 0.88875
[4,] 0.5716370 1.315 0.94500
[5,] 0.5844656 1.340 0.96250

$n
[1] 12 12 12

$conf
          [,1]     [,2]      [,3]
[1,] 0.5464792 1.267195 0.8499809
[2,] 0.5652042 1.312805 0.9275191

$out
numeric(0)

$group
numeric(0)

$names
[1] "S.D."  "Range" "IQR"  

Warning message:
In bxp(list(stats = c(0.548406783327851, 0.551110084510166, 0.555841712884186,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> 
> try(system("convert tmp/1bcvt1354186797.ps tmp/1bcvt1354186797.png",intern=TRUE))
character(0)
> try(system("convert tmp/26tkw1354186797.ps tmp/26tkw1354186797.png",intern=TRUE))
character(0)
> try(system("convert tmp/3nvnx1354186797.ps tmp/3nvnx1354186797.png",intern=TRUE))
character(0)
> try(system("convert tmp/4jw6f1354186797.ps tmp/4jw6f1354186797.png",intern=TRUE))
character(0)
> try(system("convert tmp/57ljb1354186797.ps tmp/57ljb1354186797.png",intern=TRUE))
character(0)
> try(system("convert tmp/6yf2t1354186797.ps tmp/6yf2t1354186797.png",intern=TRUE))
character(0)
> 
> 
> proc.time()
   user  system elapsed 
  3.355   0.519   3.868