R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

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> x <- c(40,41,25,19,19,18,10,17,25,30,32,24,38,36,26,25,26,16,12,15,21,33,32,24,41,38,28,24,30,18)
> par1 = '12'
> par1 <- '12'
> #'GNU S' R Code compiled by R2WASP v. 1.2.327 (Mon, 30 Nov 2015 07:01:18 +0000)
> #Author: root
> #To cite this work: Wessa P., (2015), Mean Plot (v1.0.5) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/rwasp_meanplot.wasp/
> #Source of accompanying publication: Office for Research, Development, and Education
> #
> par1 <- as.numeric(par1)
> x <- na.omit(x)
> (n <- length(x))
[1] 30
> (np <- floor(n / par1))
[1] 2
> 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] 3 3 3 3 3 3 2 2 2 2 2 2
> arr
      [,1] [,2] [,3]
 [1,]   40   38   41
 [2,]   41   36   38
 [3,]   25   26   28
 [4,]   19   25   24
 [5,]   19   26   30
 [6,]   18   16   18
 [7,]   10   12   NA
 [8,]   17   15   NA
 [9,]   25   21   NA
[10,]   30   33   NA
[11,]   32   32   NA
[12,]   24   24   NA
> darr
      [,1] [,2] [,3]
 [1,]    1   -2   -3
 [2,]  -16  -10  -10
 [3,]   -6   -1   -4
 [4,]    0    1    6
 [5,]   -1  -10  -12
 [6,]   -8   -4   NA
 [7,]    7    3   NA
 [8,]    8    6   NA
 [9,]    5   12   NA
[10,]    2   -1   NA
[11,]   -8   -8   NA
[12,]   14   17   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/1cpcj1476378769.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/2c2vm1476378769.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/31lao1476378769.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/4z8rr1476378769.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,] 38.0 36.0 25.0 19.0 19.0   16   10   15   21  30.0    32    24
[2,] 39.0 37.0 25.5 21.5 22.5   17   10   15   21  30.0    32    24
[3,] 40.0 38.0 26.0 24.0 26.0   18   11   16   23  31.5    32    24
[4,] 40.5 39.5 27.0 24.5 28.0   18   12   17   25  33.0    32    24
[5,] 41.0 41.0 28.0 25.0 30.0   18   12   17   25  33.0    32    24

$n
 [1] 3 3 3 3 3 3 2 2 2 2 2 2

$conf
         [,1]     [,2]     [,3]     [,4]     [,5]     [,6]      [,7]     [,8]
[1,] 38.63168 35.71947 24.63168 21.26336 20.98283 17.08779  8.765543 13.76554
[2,] 41.36832 40.28053 27.36832 26.73664 31.01717 18.91221 13.234457 18.23446
         [,9]    [,10] [,11] [,12]
[1,] 18.53109 28.14831    32    24
[2,] 27.46891 34.85169    32    24

$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(38, 39, 40, 40.5, 41, 36, 37, 38, 39.5, 41,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/5ey3v1476378769.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]  [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12]
[1,] -3.0  -16 -6.0  0.0 -12.0   -8    3    6  5.0  -1.0    -8  14.0
[2,] -2.5  -13 -5.0  0.5 -11.0   -8    3    6  5.0  -1.0    -8  14.0
[3,] -2.0  -10 -4.0  1.0 -10.0   -6    5    7  8.5   0.5    -8  15.5
[4,] -0.5  -10 -2.5  3.5  -5.5   -4    7    8 12.0   2.0    -8  17.0
[5,]  1.0  -10 -1.0  6.0  -1.0   -4    7    8 12.0   2.0    -8  17.0

$n
 [1] 3 3 3 3 3 2 2 2 2 2 2 2

$conf
           [,1]      [,2]      [,3]     [,4]       [,5]       [,6]      [,7]
[1,] -3.8244269 -12.73664 -6.280534 -1.73664 -15.017174 -10.468915 0.5310851
[2,] -0.1755731  -7.26336 -1.719466  3.73664  -4.982826  -1.531085 9.4689149
         [,8]      [,9]     [,10] [,11]    [,12]
[1,] 4.765543  0.679399 -2.851686    -8 12.14831
[2,] 9.234457 16.320601  3.851686    -8 18.85169

$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(-3, -2.5, -2, -0.5, 1, -16, -13, -10, -10,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/61a0o1476378769.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]
[1,] 10.0 12.0   18
[2,] 18.5 18.5   24
[3,] 24.5 25.5   29
[4,] 31.0 32.5   38
[5,] 41.0 38.0   41

$n
[1] 12 12  6

$conf
         [,1]     [,2]     [,3]
[1,] 18.79867 19.11451 19.96955
[2,] 30.20133 31.88549 38.03045

$out
numeric(0)

$group
numeric(0)

$names
[1] "1" "2" NA 

Warning message:
In bxp(list(stats = c(10, 18.5, 24.5, 31, 41, 12, 18.5, 25.5, 32.5,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/7zgfh1476378769.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,] 11.00000 11.00 11.000
[2,] 20.00000 20.50 20.250
[3,] 24.50000 25.00 24.625
[4,] 31.75000 31.75 31.750
[5,] 39.66667 40.00 39.750

$n
[1] 12 12 12

$conf
         [,1]    [,2]     [,3]
[1,] 19.14075 19.8688 19.37977
[2,] 29.85925 30.1312 29.87023

$out
numeric(0)

$group
numeric(0)

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

Warning message:
In bxp(list(stats = c(11, 20, 24.5, 31.75, 39.6666666666667, 11,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> 
> try(system("convert tmp/1cpcj1476378769.ps tmp/1cpcj1476378769.png",intern=TRUE))
character(0)
> try(system("convert tmp/2c2vm1476378769.ps tmp/2c2vm1476378769.png",intern=TRUE))
character(0)
> try(system("convert tmp/31lao1476378769.ps tmp/31lao1476378769.png",intern=TRUE))
character(0)
> try(system("convert tmp/4z8rr1476378769.ps tmp/4z8rr1476378769.png",intern=TRUE))
character(0)
> try(system("convert tmp/5ey3v1476378769.ps tmp/5ey3v1476378769.png",intern=TRUE))
character(0)
> try(system("convert tmp/61a0o1476378769.ps tmp/61a0o1476378769.png",intern=TRUE))
character(0)
> try(system("convert tmp/7zgfh1476378769.ps tmp/7zgfh1476378769.png",intern=TRUE))
character(0)
> 
> 
> proc.time()
   user  system elapsed 
  2.518   0.188   2.757