R version 3.2.5 (2016-04-14) -- "Very, Very Secure Dishes"
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> x <- c(8.9,9.2,12.8,11.1,11.2,13.1,12.6,10,12.3,12.5,11.4,11.5,10.4,11,15,12.7,11.6,13.9,12.6,11.2,15.8,15.3,14,14.6,11.5,12.8,16.2,12.8,13.5,12.5,13.2,12,14.2,17.5,13.8,13.9,11.3,12.1,16.2,11.6,12.5,15.6,12.3,12,12.1,13.9,12.3,10.5,14.2,13.2,13.7,14.2,15.3,16.3,15.1,13.4,14,15.5,12.5,12.9,12.9,13.4,15,14.4,14,15.2,15,12.4,18.7,20.6,17.3,11.4)
> 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,]  8.9 10.4 11.5 11.3 14.2 12.9   NA
 [2,]  9.2 11.0 12.8 12.1 13.2 13.4   NA
 [3,] 12.8 15.0 16.2 16.2 13.7 15.0   NA
 [4,] 11.1 12.7 12.8 11.6 14.2 14.4   NA
 [5,] 11.2 11.6 13.5 12.5 15.3 14.0   NA
 [6,] 13.1 13.9 12.5 15.6 16.3 15.2   NA
 [7,] 12.6 12.6 13.2 12.3 15.1 15.0   NA
 [8,] 10.0 11.2 12.0 12.0 13.4 12.4   NA
 [9,] 12.3 15.8 14.2 12.1 14.0 18.7   NA
[10,] 12.5 15.3 17.5 13.9 15.5 20.6   NA
[11,] 11.4 14.0 13.8 12.3 12.5 17.3   NA
[12,] 11.5 14.6 13.9 10.5 12.9 11.4   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/18p9y1461428703.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/21w2b1461428703.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/3vbzy1461428703.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/41ymp1461428703.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,]  8.9  9.20 12.8 11.10 11.2 12.50 12.3 10.0 12.1  12.5 11.40  10.5
[2,] 10.4 11.00 13.7 11.60 11.6 13.10 12.6 11.2 12.3  13.9 12.30  11.4
[3,] 11.4 12.45 15.0 12.75 13.0 14.55 12.9 12.0 14.1  15.4 13.15  12.2
[4,] 12.9 13.20 16.2 14.20 14.0 15.60 15.0 12.4 15.8  17.5 14.00  13.9
[5,] 14.2 13.40 16.2 14.40 15.3 16.30 15.1 13.4 18.7  20.6 14.00  14.6

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

$conf
          [,1]     [,2]     [,3]     [,4]     [,5]     [,6]     [,7]     [,8]
[1,]  9.787419 11.03093 13.38742 11.07292 11.45192 12.93742 11.35192 11.22596
[2,] 13.012581 13.86907 16.61258 14.42708 14.54808 16.16258 14.44808 12.77404
         [,9]    [,10]    [,11]    [,12]
[1,] 11.84239 13.07788 12.05345 10.58742
[2,] 16.35761 17.72212 14.24655 13.81258

$out
[1] 17.3

$group
[1] 11

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

Warning message:
In bxp(list(stats = c(8.9, 10.4, 11.4, 12.9, 14.2, 9.2, 11, 12.45,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/58owk1461428703.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,]  8.90 10.4 11.50 10.5 12.5 11.40   NA
[2,] 10.55 11.4 12.65 11.8 13.3 13.15   NA
[3,] 11.45 13.3 13.35 12.2 14.1 14.70   NA
[4,] 12.55 14.8 14.05 13.2 15.2 16.25   NA
[5,] 13.10 15.8 14.20 13.9 16.3 20.60   NA

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

$conf
         [,1]     [,2]     [,3]     [,4]    [,5]     [,6] [,7]
[1,] 10.53779 11.74924 12.71145 11.56145 13.2334 13.28607   NA
[2,] 12.36221 14.85076 13.98855 12.83855 14.9666 16.11393   NA

$out
[1] 16.2 17.5 16.2 15.6

$group
[1] 3 3 4 4

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

Warning message:
In bxp(list(stats = c(8.9, 10.55, 11.45, 12.55, 13.1, 10.4, 11.4,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/642wc1461428703.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,] 1.148332  2.8 1.6000
[2,] 1.344123  3.4 1.8500
[3,] 1.572134  4.1 1.9625
[4,] 1.968390  5.6 2.2125
[5,] 2.854061  8.1 2.7500

$n
[1] 12 12 12

$conf
         [,1]     [,2]     [,3]
[1,] 1.287402 3.096565 1.797161
[2,] 1.856866 5.103435 2.127839

$out
[1] 0.9

$group
[1] 3

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

Warning message:
In bxp(list(stats = c(1.14833212385035, 1.34412255121916, 1.57213398453499,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> 
> try(system("convert tmp/18p9y1461428703.ps tmp/18p9y1461428703.png",intern=TRUE))
character(0)
> try(system("convert tmp/21w2b1461428703.ps tmp/21w2b1461428703.png",intern=TRUE))
character(0)
> try(system("convert tmp/3vbzy1461428703.ps tmp/3vbzy1461428703.png",intern=TRUE))
character(0)
> try(system("convert tmp/41ymp1461428703.ps tmp/41ymp1461428703.png",intern=TRUE))
character(0)
> try(system("convert tmp/58owk1461428703.ps tmp/58owk1461428703.png",intern=TRUE))
character(0)
> try(system("convert tmp/642wc1461428703.ps tmp/642wc1461428703.png",intern=TRUE))
character(0)
> 
> 
> proc.time()
   user  system elapsed 
  2.142   0.462   2.620