R version 2.8.0 (2008-10-20)
Copyright (C) 2008 The R Foundation for Statistical Computing
ISBN 3-900051-07-0

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> y <- c(20.55800346,20.46427906,20.33547715,19.05326194,18.13494723,19.24163651,19.12187155,19.10388821,19.81885487,18.96432146,18.88076723,18.77700878,18.19914546,19.75662157,17.97502951,17.53319617)
> x <- c(80,70,70,62,62,60,60,60,60,60,55,55,53,50,40,30)
> ylab = 'Species richness'
> xlab = 'Age of homegarden (year)'
> library('Kendall')
> k <- Kendall(x,y)
> postscript(file="/var/www/html/freestat/rcomp/tmp/1wfsi1287676021.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> 
> plot(x,y,main='Scatterplot',xlab=xlab,ylab=ylab)
> grid()
> dev.off()
null device 
          1 
> postscript(file="/var/www/html/freestat/rcomp/tmp/2p6rl1287676021.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> 
> plot(rank(x),rank(y),main='Scatterplot of Ranks',xlab=xlab,ylab=ylab)
> grid()
> dev.off()
null device 
          1 
> 
> #Note: the /var/www/html/freestat/rcomp/createtable file can be downloaded at http://www.wessa.net/cretab
> load(file="/var/www/html/freestat/rcomp/createtable")
> 
> a<-table.start()
> a<-table.row.start(a)
> a<-table.element(a,'Kendall tau Rank Correlation',2,TRUE)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'Kendall tau',header=TRUE)
> a<-table.element(a,k$tau)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'2-sided p-value',header=TRUE)
> a<-table.element(a,k$sl)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'Score',header=TRUE)
> a<-table.element(a,k$S)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'Var(Score)',header=TRUE)
> a<-table.element(a,k$varS)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'Denominator',header=TRUE)
> a<-table.element(a,k$D)
> a<-table.row.end(a)
> a<-table.end(a)
> table.save(a,file="/var/www/html/freestat/rcomp/tmp/33y7c1287676021.tab") 
> 
> try(system("convert tmp/1wfsi1287676021.ps tmp/1wfsi1287676021.png",intern=TRUE))
character(0)
> try(system("convert tmp/2p6rl1287676021.ps tmp/2p6rl1287676021.png",intern=TRUE))
character(0)
> 
> 
> proc.time()
   user  system elapsed 
  0.897   0.475   0.958