R version 2.15.2 (2012-10-26) -- "Trick or Treat"
Copyright (C) 2012 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i686-pc-linux-gnu (32-bit)

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> x <- c(0.235,0.241,0.245,0.247,0.247,0.248,0.249,0.250,0.251,0.252,0.252,0.252,0.254,0.254,0.255,0.255,0.256,0.256,0.257,0.258,0.259,0.259,0.259,0.259,0.259,0.260,0.260,0.260,0.260,0.260,0.261,0.261,0.262,0.262,0.263,0.263,0.263,0.271,0.272,0.274)
> par2 = '40'
> par1 = '30'
> par2 <- '40'
> par1 <- '30'
> #'GNU S' R Code compiled by R2WASP v. 1.0.44 ()
> #Author: Prof. Dr. P. Wessa
> #To cite this work: AUTHOR(S), (YEAR), YOUR SOFTWARE TITLE (vNUMBER) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/rwasp_YOURPAGE.wasp/
> #Source of accompanying publication: Office for Research, Development, and Education
> #Technical description: Write here your technical program description (don't use hard returns!)
> library(MASS)
> PPCCWeibull <- function(shape, scale, x)
+ {
+ x <- sort(x)
+ pp <- ppoints(x)
+ cor(qweibull(pp, shape=shape, scale=scale), x)
+ }
> par1 <- as.numeric(par1)
> par2 <- as.numeric(par2)
> if (par1 < 0.1) par1 <- 0.1
> if (par1 > 50) par1 <- 50
> if (par2 < 0.1) par2 <- 0.1
> if (par2 > 50) par2 <- 50
> par1h <- par1*10
> par2h <- par2*10
> sortx <- sort(x)
> c <- array(NA,dim=c(par2h))
> for (i in par1h:par2h)
+ {
+ c[i] <- cor(qweibull(ppoints(x), shape=i/10,scale=2),sortx)
+ }
> postscript(file="/var/wessaorg/rcomp/tmp/197sz1355263819.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> plot((par1h:par2h)/10,c[par1h:par2h],xlab='shape',ylab='correlation',main='PPCC Plot - Weibull')
> dev.off()
null device 
          1 
> f<-fitdistr(x, 'weibull')
Warning messages:
1: In densfun(x, parm[1], parm[2], ...) : NaNs produced
2: In densfun(x, parm[1], parm[2], ...) : NaNs produced
3: In densfun(x, parm[1], parm[2], ...) : NaNs produced
4: In densfun(x, parm[1], parm[2], ...) : NaNs produced
5: In densfun(x, parm[1], parm[2], ...) : NaNs produced
> f$estimate
     shape      scale 
34.8882158  0.2602151 
> f$sd
      shape       scale 
3.961857978 0.001248473 
> xlab <- paste('Weibull(shape=',round(f$estimate[[1]],2))
> xlab <- paste(xlab,', scale=')
> xlab <- paste(xlab,round(f$estimate[[2]],2))
> xlab <- paste(xlab,')')
> postscript(file="/var/wessaorg/rcomp/tmp/2eyzv1355263819.ps",horizontal=F,onefile=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> qqplot(qweibull(ppoints(x), shape=f$estimate[[1]], scale=f$estimate[[2]]), x, main='QQ plot (Weibull)', xlab=xlab )
> grid()
> dev.off()
null device 
          1 
> 
> #Note: the /var/wessaorg/rcomp/createtable file can be downloaded at http://www.wessa.net/cretab
> load(file="/var/wessaorg/rcomp/createtable")
> 
> a<-table.start()
> a<-table.row.start(a)
> a<-table.element(a,'Parameter',1,TRUE)
> a<-table.element(a,'Estimated Value',1,TRUE)
> a<-table.element(a,'Standard Deviation',1,TRUE)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'shape',header=TRUE)
> a<-table.element(a,f$estimate[1])
> a<-table.element(a,f$sd[1])
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'scale',header=TRUE)
> a<-table.element(a,f$estimate[2])
> a<-table.element(a,f$sd[2])
> a<-table.row.end(a)
> a<-table.end(a)
> table.save(a,file="/var/wessaorg/rcomp/tmp/3rnkn1355263819.tab") 
> 
> try(system("convert tmp/197sz1355263819.ps tmp/197sz1355263819.png",intern=TRUE))
character(0)
> try(system("convert tmp/2eyzv1355263819.ps tmp/2eyzv1355263819.png",intern=TRUE))
character(0)
> 
> 
> proc.time()
   user  system elapsed 
  2.103   0.329   2.453