File: S4R.R

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## 
## $Id: S4R.R 79 2002-09-10 11:48:30Z dj $
##
## R/S-Plus compatibility 

usingR <- function(major=0, minor=0){
  if(is.null(version$language))
    return(FALSE)
  if(version$language!="R")
    return(FALSE)
  version$major>=major && version$minor>=minor
}

## constant holding the appropriate error class returned by try() 
if(usingR()){
  ErrorClass <- "try-error"
} else {
  ErrorClass <- "Error"  
}