Nothing
simplifyTypes <- function(x,verbose=TRUE,...){
if(!is.data.frame(x) && !is.data.set(x)) stop("first arg. should be a data.frame or data.set")
attr.x <- attributes(x)
y <- list()
for(i in seq_along(x)){
y[[i]] <- simplifyType(x[[i]])
if(verbose && typeof(y[[i]])!=typeof(x[[i]])) message("Changed type of variable ",
names(x)[i],
" from ",
sQuote(typeof(x[[i]])),
" to ",
sQuote(typeof(y[[i]])))
}
attributes(y) <- attr.x
y
}
simplifyType <- function(x) UseMethod("simplifyType")
simplifyType.default <- function(x) x
simplifyType.double <- function(x){
ok <- is.finite(x)
#y <- as.integer(x)
if(all(x[ok]==trunc(x[ok]))) as.integer(x) else x
}
simplifyType.labelled <- function(x){
if(typeof(x) %in% c("integer","character")) return(x)
ok <- is.finite(x)
if(any(x[ok]!=trunc(x[ok]))) return(x)
y <- x
attributes(y) <- NULL
y <- as.integer(y)
attributes(y) <- attributes(x)
if(length(cds <- attr(y,"labels"))){
clab <- names(cds)
cds <- as.integer(cds)
names(cds) <- clab
attr(y,"labels") <- cds
}
if(length(msg <- attr(y,"missing.values"))){
if(length(msg$values)) msg$values <- as.integer(msg$values)
#if(length(msg$range)) msg$range[is.finite(msg$range)] <- as.integer(msg$range)
attr(y,"missing.values") <- msg
}
y
}
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