R version 3.0.2 (2013-09-25) -- "Frisbee Sailing"
Copyright (C) 2013 The R Foundation for Statistical Computing
Platform: i686-pc-linux-gnu (32-bit)

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> x <- c(20.1,20.1,20.1,20.3,20.7,20.6,20.3,19.9,19.7,19.4,19.1,18.8,18.9,18.7,18.8,19.5,19.3,19.1,19.1,19,18.8,19.2,18.9,18.7,18.5,18.4,18.3,18.3,18.3,18.5,19.2,19.4,19.1,19.5,18.8,19.3,20.4,20.9,21.1,20.6,20.4,20.8,21.1,21.6,22,22.2,22.4,22.8,22.7,22.8,22.9,22.9,22.6,21.9,20.8,20.3,20.4,21.2,21.4,20.9,20,19.5,19.2,19.3,19.4,19.5,20,20.1,19.5,18.6,18.4,18.4,19.3,19.8,19.8,19.8,20.1,20.3,19.7,20.2,20.6,21,21.4,21.9)
> par1 = '12'
> par1 <- '12'
> #'GNU S' R Code compiled by R2WASP v. 1.2.291 ()
> #Author: root
> #To cite this work: Wessa P., (2012), Mean Plot (v1.0.4) 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)
> (n <- length(x))
[1] 84
> (np <- floor(n / par1))
[1] 7
> 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] 7 7 7 7 7 7 7 7 7 7 7 7
> arr
      [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8]
 [1,] 20.1 18.9 18.5 20.4 22.7 20.0 19.3   NA
 [2,] 20.1 18.7 18.4 20.9 22.8 19.5 19.8   NA
 [3,] 20.1 18.8 18.3 21.1 22.9 19.2 19.8   NA
 [4,] 20.3 19.5 18.3 20.6 22.9 19.3 19.8   NA
 [5,] 20.7 19.3 18.3 20.4 22.6 19.4 20.1   NA
 [6,] 20.6 19.1 18.5 20.8 21.9 19.5 20.3   NA
 [7,] 20.3 19.1 19.2 21.1 20.8 20.0 19.7   NA
 [8,] 19.9 19.0 19.4 21.6 20.3 20.1 20.2   NA
 [9,] 19.7 18.8 19.1 22.0 20.4 19.5 20.6   NA
[10,] 19.4 19.2 19.5 22.2 21.2 18.6 21.0   NA
[11,] 19.1 18.9 18.8 22.4 21.4 18.4 21.4   NA
[12,] 18.8 18.7 19.3 22.8 20.9 18.4 21.9   NA
> darr
      [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8]
 [1,]  0.0 -0.2 -0.1  0.5  0.1 -0.5  0.5   NA
 [2,]  0.0  0.1 -0.1  0.2  0.1 -0.3  0.0   NA
 [3,]  0.2  0.7  0.0 -0.5  0.0  0.1  0.0   NA
 [4,]  0.4 -0.2  0.0 -0.2 -0.3  0.1  0.3   NA
 [5,] -0.1 -0.2  0.2  0.4 -0.7  0.1  0.2   NA
 [6,] -0.3  0.0  0.7  0.3 -1.1  0.5 -0.6   NA
 [7,] -0.4 -0.1  0.2  0.5 -0.5  0.1  0.5   NA
 [8,] -0.2 -0.2 -0.3  0.4  0.1 -0.6  0.4   NA
 [9,] -0.3  0.4  0.4  0.2  0.8 -0.9  0.4   NA
[10,] -0.3 -0.3 -0.7  0.2  0.2 -0.2  0.4   NA
[11,] -0.3 -0.2  0.5  0.4 -0.5  0.0  0.5   NA
[12,]  0.1 -0.2  1.1 -0.1 -0.9  0.9   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/13bn21381772770.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/2r0vm1381772770.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/3eddh1381772770.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/4huzh1381772770.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,] 18.50 18.4 18.3 18.30 18.30 18.5 19.10 19.00 18.8  18.6 18.40 18.40
[2,] 19.10 19.1 19.0 19.40 19.35 19.3 19.45 19.65 19.3  19.3 18.85 18.75
[3,] 20.00 19.8 19.8 19.80 20.10 20.3 20.00 20.10 19.7  19.5 19.10 19.30
[4,] 20.25 20.5 20.6 20.45 20.55 20.7 20.55 20.25 20.5  21.1 21.40 21.40
[5,] 20.40 20.9 22.9 20.60 20.70 21.9 21.10 20.30 22.0  22.2 22.40 22.80

$n
 [1] 7 7 7 7 7 7 7 7 7 7 7 7

$conf
         [,1]     [,2]     [,3]     [,4]     [,5]     [,6]    [,7]     [,8]
[1,] 19.31324 18.96394 18.84451 19.17296 19.38338 19.46394 19.3431 19.74169
[2,] 20.68676 20.63606 20.75549 20.42704 20.81662 21.13606 20.6569 20.45831
         [,9]    [,10]    [,11]    [,12]
[1,] 18.98338 18.42507 17.57718 17.71746
[2,] 20.41662 20.57493 20.62282 20.88254

$out
[1] 22.7 22.8 22.9 22.6 21.6

$group
[1] 1 2 4 5 8

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

Warning message:
In bxp(list(stats = c(18.5, 19.1, 20, 20.25, 20.4, 18.4, 19.1, 19.8,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/5hy7l1381772770.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]
[1,] -0.50 -0.10 0.00 -0.3 -0.20 -1.10 -0.50 -0.60 -0.30  -0.7 -0.50
[2,] -0.15 -0.05 0.00 -0.2 -0.15 -0.45 -0.25 -0.25 -0.05  -0.3 -0.25
[3,]  0.00  0.00 0.00  0.0  0.10  0.00  0.10 -0.20  0.40  -0.2  0.00
[4,]  0.30  0.10 0.15  0.2  0.20  0.40  0.35  0.25  0.40   0.2  0.45
[5,]  0.50  0.20 0.20  0.4  0.40  0.70  0.50  0.40  0.80   0.4  0.50
             [,12]
[1,] -9.000000e-01
[2,] -2.000000e-01
[3,] -1.776357e-15
[4,]  9.000000e-01
[5,]  1.100000e+00

$n
 [1] 7 7 7 7 7 7 7 7 7 7 7 6

$conf
           [,1]        [,2]        [,3]       [,4]       [,5]       [,6]
[1,] -0.2687327 -0.08957758 -0.08957758 -0.2388735 -0.1090144 -0.5076063
[2,]  0.2687327  0.08957758  0.08957758  0.2388735  0.3090144  0.5076063
           [,7]        [,8]      [,9]       [,10]      [,11]      [,12]
[1,] -0.2583103 -0.49859193 0.1312673 -0.49859193 -0.4180287 -0.7095355
[2,]  0.4583103  0.09859193 0.6687327  0.09859193  0.4180287  0.7095355

$out
[1] -0.3  0.7 -0.5 -0.7 -0.9

$group
[1] 2 3 3 5 9

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

Warning message:
In bxp(list(stats = c(-0.5, -0.15, 0, 0.300000000000001, 0.5, -0.0999999999999979,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/67w1b1381772770.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] [,8]
[1,] 18.80 18.70 18.30 20.4 20.30 18.40 19.30   NA
[2,] 19.55 18.80 18.35 20.7 20.85 18.90 19.80   NA
[3,] 20.10 18.95 18.65 21.1 21.65 19.45 20.15   NA
[4,] 20.30 19.15 19.25 22.1 22.75 19.75 20.80   NA
[5,] 20.70 19.50 19.50 22.8 22.90 20.10 21.90   NA

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

$conf
         [,1]     [,2]    [,3]     [,4]    [,5]     [,6]     [,7] [,8]
[1,] 19.75792 18.79036 18.2395 20.46145 20.7834 19.06231 19.69389   NA
[2,] 20.44208 19.10964 19.0605 21.73855 22.5166 19.83769 20.60611   NA

$out
numeric(0)

$group
numeric(0)

$names
[1] "1" "2" "3" "4" "5" "6" "7" NA 

Warning message:
In bxp(list(stats = c(18.8, 19.55, 20.1, 20.3, 20.7, 18.7, 18.8,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/7b6ul1381772770.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,] 19.98571 19.10 19.6750
[2,] 20.02857 19.60 19.8500
[3,] 20.06429 19.80 19.9500
[4,] 20.10714 20.05 20.0375
[5,] 20.15714 20.30 20.2000

$n
[1] 12 12 12

$conf
         [,1]     [,2]     [,3]
[1,] 20.02845 19.59475 19.86448
[2,] 20.10012 20.00525 20.03552

$out
numeric(0)

$group
numeric(0)

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

Warning message:
In bxp(list(stats = c(19.9857142857143, 20.0285714285714, 20.0642857142857,  :
  some notches went outside hinges ('box'): maybe set notch=FALSE
> dev.off()
null device 
          1 
> 
> try(system("convert tmp/13bn21381772770.ps tmp/13bn21381772770.png",intern=TRUE))
character(0)
> try(system("convert tmp/2r0vm1381772770.ps tmp/2r0vm1381772770.png",intern=TRUE))
character(0)
> try(system("convert tmp/3eddh1381772770.ps tmp/3eddh1381772770.png",intern=TRUE))
character(0)
> try(system("convert tmp/4huzh1381772770.ps tmp/4huzh1381772770.png",intern=TRUE))
character(0)
> try(system("convert tmp/5hy7l1381772770.ps tmp/5hy7l1381772770.png",intern=TRUE))
character(0)
> try(system("convert tmp/67w1b1381772770.ps tmp/67w1b1381772770.png",intern=TRUE))
character(0)
> try(system("convert tmp/7b6ul1381772770.ps tmp/7b6ul1381772770.png",intern=TRUE))
character(0)
> 
> 
> proc.time()
   user  system elapsed 
  5.119   1.097   6.193