R version 2.15.3 (2013-03-01) -- "Security Blanket"
Copyright (C) 2013 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i686-pc-linux-gnu (32-bit)

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> x <- c(30,27,9,20,3,15,5,10,23,34,20,17,26,16,17,15,38,16,38,15,5,18,8,33,12,22,23,45,8,45,9,45,21,16,17,31,15,22,14,13,37,23,22,15,43,27,21,36,38,12,1,25,20,11,55,39,24,2,3,16,45,24,12,34,43,18,18,34,29,15,6,58,37,13,12,9,20,29,13,36,33,23,22,1,3,15,13,44,11,20,28,14,7,8,9,33,4,22,7,14,24,13,30,19,34,9,27)
> par1 = '18'
> xlab = 'Stress'
> main = 'Howell'
> par1 <- '18'
> #'GNU S' R Code compiled by R2WASP v. 1.2.291 ()
> #Author: root
> #To cite this work: Ian E. Holliday, 2012, Histogram,  QQplot and Density Plot (v1.0.1) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/Ian.Holliday/rwasp_Distributional Plots.wasp/
> #Source of accompanying publication: 
> #
> x <- x[!is.na(x)]
> postscript(file="/var/wessaorg/rcomp/tmp/15m4t1368736028.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> par1 <- as.numeric(par1)
> myhist<-hist(x, breaks=par1, col=2, xlab=xlab, main=main)
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/256xv1368736028.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> qqnorm(x)
> qqline(x, col=2)
> dev.off()
null device 
          1 
> postscript(file="/var/wessaorg/rcomp/tmp/3o1f21368736028.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> plot(density(x), xlab=xlab, main=main)
> dev.off()
null device 
          1 
> 
> #Note: the /var/wessaorg/rcomp/createtable file can be downloaded at http://www.wessa.net/cretab
> load(file="/var/wessaorg/rcomp/createtable")
> 
> a<-table.start()
> a<-table.row.start(a)
> a<-table.element(a,'Descriptive Statistics',3,TRUE)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'mean',header=TRUE)
> a<-table.element(a,signif(mean(x), 6))
> a<-table.element(a,hyperlink('http://www.xycoon.com/arithmetic_mean.htm','formula','click to see the formula'))
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'standard deviation',header=TRUE)
> a<-table.element(a,signif(sd(x), 6))
> a<-table.element(a,hyperlink('http://www.xycoon.com/unbiased1.htm','formula','click to see the formula'))
> a<-table.row.end(a)
> a<-table.end(a)
> table.save(a,file="/var/wessaorg/rcomp/tmp/4y6bn1368736028.tab") 
> 
> try(system("convert tmp/15m4t1368736028.ps tmp/15m4t1368736028.png",intern=TRUE))
character(0)
> try(system("convert tmp/256xv1368736028.ps tmp/256xv1368736028.png",intern=TRUE))
character(0)
> try(system("convert tmp/3o1f21368736028.ps tmp/3o1f21368736028.png",intern=TRUE))
character(0)
> 
> 
> proc.time()
   user  system elapsed 
  2.168   0.472   2.610