R version 3.0.2 (2013-09-25) -- "Frisbee Sailing"
Copyright (C) 2013 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

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> x <- c(18.3,18.6,18.7,20.1,18.9,20.1,19.8,15.9,19.9,19.6,15.6,14.2,13.6,13.9,15,14.1,13.5,15.3,14.7,12.5,16.1,15.9,15.9,15.7,14.7,15.3,18.4,16.8,16.5,19.3,17.1,15.7,19.1,18.6,18.4,17.1,18.3,19.4,22.3,19.4,21.3,20.3,19.3,17.5,19.9,19.6,19.7,18.1,19.1,20.7,22.5,20,20.2,20.4,19.6,18.1,19.3,21,19.9,17.7,19.4,19.3,21.5,20.9,20.8,20.3,21.4,17.4,21.1,22,20.4,19)
> 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,] 18.3 13.6 14.7 18.3 19.1 19.4   NA
 [2,] 18.6 13.9 15.3 19.4 20.7 19.3   NA
 [3,] 18.7 15.0 18.4 22.3 22.5 21.5   NA
 [4,] 20.1 14.1 16.8 19.4 20.0 20.9   NA
 [5,] 18.9 13.5 16.5 21.3 20.2 20.8   NA
 [6,] 20.1 15.3 19.3 20.3 20.4 20.3   NA
 [7,] 19.8 14.7 17.1 19.3 19.6 21.4   NA
 [8,] 15.9 12.5 15.7 17.5 18.1 17.4   NA
 [9,] 19.9 16.1 19.1 19.9 19.3 21.1   NA
[10,] 19.6 15.9 18.6 19.6 21.0 22.0   NA
[11,] 15.6 15.9 18.4 19.7 19.9 20.4   NA
[12,] 14.2 15.7 17.1 18.1 17.7 19.0   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/1r5wg1416572575.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/26un81416572575.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/3dekd1416572575.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/4j2yj1416572575.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,] 13.6 13.90 15.0 14.1 13.50 19.3 14.70 15.70 19.1  15.9 15.60  14.2
[2,] 14.7 15.30 18.4 16.8 16.50 19.3 17.10 15.70 19.1  18.6 15.90  15.7
[3,] 18.3 18.95 20.1 19.7 19.55 20.2 19.45 16.65 19.6  19.6 19.05  17.4
[4,] 19.1 19.40 22.3 20.1 20.80 20.3 19.80 17.50 19.9  21.0 19.90  18.1
[5,] 19.4 20.70 22.5 20.9 21.30 20.4 21.40 18.10 19.9  22.0 20.40  19.0

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

$conf
         [,1]     [,2]     [,3]     [,4]     [,5]     [,6]     [,7]     [,8]
[1,] 15.46186 16.30537 17.58437 17.57139 16.77636 19.55497 17.70841 15.48894
[2,] 21.13814 21.59463 22.61563 21.82861 22.32364 20.84503 21.19159 17.81106
         [,9]    [,10]    [,11]    [,12]
[1,] 19.08397 18.05192 16.46987 15.85192
[2,] 20.11603 21.14808 21.63013 18.94808

$out
[1] 15.3 12.5 16.1 21.1

$group
[1] 6 8 9 9

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

Warning message:
In bxp(list(stats = c(13.6, 14.7, 18.3, 19.1, 19.4, 13.9, 15.3,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/5bnp21416572575.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,] 14.20 12.50 14.7 17.5 17.70 17.40   NA
[2,] 17.10 13.75 16.1 18.8 19.20 19.35   NA
[3,] 18.80 14.85 17.1 19.5 19.95 20.60   NA
[4,] 19.85 15.80 18.5 20.1 20.55 21.25   NA
[5,] 20.10 16.10 19.3 21.3 22.50 22.00   NA

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

$conf
         [,1]     [,2]     [,3]     [,4]     [,5]    [,6] [,7]
[1,] 17.54571 13.91498 16.00534 18.90706 19.33426 19.7334   NA
[2,] 20.05429 15.78502 18.19466 20.09294 20.56574 21.4666   NA

$out
[1] 22.3

$group
[1] 4

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

Warning message:
In bxp(list(stats = c(14.2, 17.1, 18.8, 19.85, 20.1, 12.5, 13.75,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/6rluf1416572575.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,] 1.686021 4.80 0.7500
[2,] 2.015228 5.05 1.7625
[3,] 2.243094 5.95 2.3625
[4,] 2.624845 6.80 3.3125
[5,] 3.005772 7.80 3.6250

$n
[1] 12 12 12

$conf
         [,1]     [,2]     [,3]
[1,] 1.965043 5.151813 1.655535
[2,] 2.521144 6.748187 3.069465

$out
numeric(0)

$group
numeric(0)

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

Warning message:
In bxp(list(stats = c(1.68602095676972, 2.01522843157392, 2.24309351965002,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> 
> try(system("convert tmp/1r5wg1416572575.ps tmp/1r5wg1416572575.png",intern=TRUE))
character(0)
> try(system("convert tmp/26un81416572575.ps tmp/26un81416572575.png",intern=TRUE))
character(0)
> try(system("convert tmp/3dekd1416572575.ps tmp/3dekd1416572575.png",intern=TRUE))
character(0)
> try(system("convert tmp/4j2yj1416572575.ps tmp/4j2yj1416572575.png",intern=TRUE))
character(0)
> try(system("convert tmp/5bnp21416572575.ps tmp/5bnp21416572575.png",intern=TRUE))
character(0)
> try(system("convert tmp/6rluf1416572575.ps tmp/6rluf1416572575.png",intern=TRUE))
character(0)
> 
> 
> proc.time()
   user  system elapsed 
  2.245   0.396   2.664