Nothing
#' @export
toSAS <- function(x, format, format.info=NULL)
UseMethod("toSAS")
#' @export
toSAS.numeric <- function(x, format=SASformat(x), format.info=NULL)
{
retval <- as.numeric(x)
attr(retval, "SASformat")=format
retval
}
#' @export
toSAS.logical <- function(x, format=SASformat(x), format.info=NULL)
{
retval <- as.character(x)
attr(retval, "SASformat")=format
retval
}
#' @export
toSAS.character <- function(x, format=SASformat(x), format.info=NULL)
{
retval <- as.character(x)
attr(retval, "SASformat")=format
retval
}
#' @export
toSAS.factor <- function(x, format=SASformat(x), format.info=NULL)
{
finfo <- process.formats(format.info)
if( (length(format>0)) && (format %in% names(finfo)) )
{
labels <- finfo[[SASformat(x)]]$label
values <- finfo[[SASformat(x)]]$value
retval <- values[match( x, labels)]
}
else
{
retval <- as.character(x)
}
attr(retval, "SASformat")=format
retval
}
#' @export
toSAS.POSIXt <- function( x, format="DATETIME16.", format.info=NULL)
{
sasBaseSeconds <- as.numeric(ISOdatetime(1960,1,1,0,0,0))
retval <- unclass(as.POSIXct(x)) - sasBaseSeconds # sasBaseSeconds is negative
attr(retval,"SASformat") <- format
retval
}
#' @export
toSAS.Date <- function(x, format="DATE9.", format.info=NULL )
{
sasBase <- as.Date(strptime("01/01/1960", "%m/%d/%Y", tz="GMT")) # days
retval <- as.numeric( as.Date(x) - sasBase)
attr(retval, "SASformat") <- format
retval
}
#' @export
toSAS.default <- function(x, format=SASformat(x), format.info=NULL)
{
retval <- as.character(x)
attr(retval, "SASformat") <- format
retval
}
#' @export
toSAS.chron <- toSAS.POSIXt
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