R version 2.15.1 (2012-06-22) -- "Roasted Marshmallows"
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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> par4 = '0.05'
> par3 = '0,35'
> par2 = '13,781'
> par1 = '63'
> par1<-as.numeric(par1)
> par2<-as.numeric(par2)
Warning message:
NAs introduced by coercion 
> par3<-as.numeric(par3)
Warning message:
NAs introduced by coercion 
> par4<-as.numeric(par4)
> df <- par1 - 1
> if (par2 > par3)
+ {
+ myc <- par3 / df * qchisq(1-par4,df)
+ } else {
+ myc <- par3 / df * qchisq(par4,df)
+ }
Error in if (par2 > par3) { : missing value where TRUE/FALSE needed
Execution halted