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(-1,4,9,18,13,9,5,9,9,17,7,4,8,1,4,2,1,5,15,11,4,11,2,3,7,6,4,5,3,2,1,1,0,9,3,4,-3)
> x <- c(-19,0,-18,-17,0,-16,-1,-11,7,-2,-9,-8,4,-7,2,1,3,5,0,11,5,-1,17,0,4,13,0,-7,19,9,2,9,8,-2,-6,-5,11)
> par7 = '0'
> par6 = '0'
> par5 = '0.1'
> par4 = '12'
> par3 = '0'
> par2 = '0'
> par1 = '-2.0'
> #'GNU S' R Code compiled by R2WASP v. 1.0.44 ()
> #Author: Prof. Dr. P. Wessa
> #To cite this work: Wessa P., (2008), Cross Correlation Function (v1.0.6) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/rwasp_cross.wasp/
> #Source of accompanying publication: Office for Research, Development, and Education
> #Technical description: 
> par1 <- as.numeric(par1)
> par2 <- as.numeric(par2)
> par3 <- as.numeric(par3)
> par4 <- as.numeric(par4)
> par5 <- as.numeric(par5)
> par6 <- as.numeric(par6)
> par7 <- as.numeric(par7)
> if (par1 == 0) {
+ x <- log(x)
+ } else {
+ x <- (x ^ par1 - 1) / par1
+ }
> if (par5 == 0) {
+ y <- log(y)
+ } else {
+ y <- (y ^ par5 - 1) / par5
+ }
> if (par2 > 0) x <- diff(x,lag=1,difference=par2)
> if (par6 > 0) y <- diff(y,lag=1,difference=par6)
> if (par3 > 0) x <- diff(x,lag=par4,difference=par3)
> if (par7 > 0) y <- diff(y,lag=par4,difference=par7)
> x
 [1] 0.4986150      -Inf 0.4984568 0.4982699      -Inf 0.4980469 0.0000000
 [8] 0.4958678 0.4897959 0.3750000 0.4938272 0.4921875 0.4687500 0.4897959
[15] 0.3750000 0.0000000 0.4444444 0.4800000      -Inf 0.4958678 0.4800000
[22] 0.0000000 0.4982699      -Inf 0.4687500 0.4970414      -Inf 0.4897959
[29] 0.4986150 0.4938272 0.3750000 0.4938272 0.4921875 0.3750000 0.4861111
[36] 0.4800000 0.4958678
> y
 [1]         NaN   1.4869835   2.4573094   3.3514136   2.9239222   2.4573094
 [7]   1.7461894   2.4573094   2.4573094   3.2753167   2.1481404   1.4869835
[13]   2.3114441   0.0000000   1.4869835   0.7177346   0.0000000   1.7461894
[19]   3.1101942   2.7098162   1.4869835   2.7098162   0.7177346   1.1612317
[25]   2.1481404   1.9623120   1.4869835   1.7461894   1.1612317   0.7177346
[31]   0.0000000   0.0000000 -10.0000000   2.4573094   1.1612317   1.4869835
[37]         NaN
> postscript(file="/var/www/html/rcomp/tmp/1dxnq1228253643.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) 
> (r <- ccf(x,y,main='Cross Correlation Function',ylab='CCF',xlab='Lag (k)'))
Error in na.fail.default(ts.intersect(as.ts(x), as.ts(y))) : 
  missing values in object
Calls: ccf -> na.action -> na.fail.default
Execution halted