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(29054.5,28543.5,28032,27009.5,37356,36844.5,29054.5,23881.5,24392.5,24392.5,24904,25982,22859,19731,17169.5,17169.5,27009.5,28032,20242,11429.5,16091.5,16091.5,19731,21831.5,21320,16091.5,18708.5,17681,26493.5,24392.5,16091.5,9891,15580,17169.5,18708.5,20753.5,16602.5,13019,14558,15069,28543.5,28543.5,20753.5,19731,22859,21320,25471,30644,31671.5,24392.5,22342.5,20242,34283.5,35311,32694,35311,34794.5,30644,35311,40484,42584.5,36333.5,32182.5,35311,48785,52936,51913.5,53958,53447,48274,57086.5,59187,62259.5,52936,49296.5,53447,63337.5,72150,70049.5,70049.5,71077,67488,76817,76817,75227.5,66410,67999.5,69027,75789.5,84602,78350.5,81479,78862,77328,89269,86652,83012.5,77839.5,83012.5,85629.5,88752.5,92903,88752.5,91314,88190.5,87679.5,100642.5,101720.5,97570,90291.5,96492,99104,102232,106894,102232,105871.5,104282,98592.5,110533,110533)
> par4 = '12'
> par3 = 'Maandelijkse omzet'
> par2 = 'niet gekend'
> par1 = 'Maandelijkse omzet stabilo kleurstiften'
> ylimmax = ''
> ylimmin = ''
> ylab = 'Omzet EUR'
> xlab = 'Maanden'
> main = 'Maandelijkse omzet'
> postscript(file="/var/wessaorg/rcomp/tmp/1e9iq1470769290.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> if (par4 != 'No season') {
+ par4 <- as.numeric(par4)
+ if (par4 < 4) par4 <- 12
+ }
> summary(x)
   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
   9891   23630   36590   50140   77460  110500 
> n <- length(x)
> postscript(file="/var/wessaorg/rcomp/tmp/2y0zc1470769290.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> if (par4=='No season') {
+ plot(x,col=2,type='b',main=main,xlab=xlab,ylab=ylab,xaxt='n')
+ axis(1,at=seq(1,n,10))
+ }
> if (par4!='No season') {
+ plot(x,col=2,type='b',main=main,xlab=xlab,ylab=ylab,xaxt='n')
+ axis(1,at=seq(1,n,par4))
+ grid(nx=0,ny=NULL,col='black')
+ abline(v=seq(1,n,par4),col='black',lty='dotted')
+ }
> dev.off()
postscript 
         2 
> 
> #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,'Univariate Dataseries',2,TRUE)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'Name of dataseries',header=TRUE)
> a<-table.element(a,par1)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'Source',header=TRUE)
> a<-table.element(a,par2)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'Description',header=TRUE)
> a<-table.element(a,par3)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'Number of observations',header=TRUE)
> a<-table.element(a,length(x))
> a<-table.row.end(a)
> a<-table.end(a)
> table.save(a,file="/var/wessaorg/rcomp/tmp/3r5yx1470769290.tab") 
> 
> try(system("convert tmp/1e9iq1470769290.ps tmp/1e9iq1470769290.png",intern=TRUE))
character(0)
> try(system("convert tmp/2y0zc1470769290.ps tmp/2y0zc1470769290.png",intern=TRUE))
character(0)
> 
> 
> proc.time()
   user  system elapsed 
  0.782   0.079   0.878