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setGeneric("recode", function(x,...,
copy=getOption("recode_copy",identical(otherwise,"copy")),
otherwise=NA) standardGeneric("recode"))
setMethod("recode","item",function(x,...,
copy=getOption("recode_copy",identical(otherwise,"copy")),
otherwise=NA){
recodings <- match.call(expand.dots=FALSE)$...
recodings <- recodings[nzchar(sapply(recodings,paste,collapse=""))]
if(length(otherwise)!=1) stop("otherwise= argument must have length 1")
if(any(sapply(sapply(recodings,"[[",1),paste)!="<-"))
stop("invalid recoding request")
if(!length(recodings)) return(x)
newcodes <- lapply(recodings,"[[",2)
conditions <- lapply(recodings,"[[",3)
has.range <- paste(lapply(conditions,"[[",1)) == "range"
if(any(has.range)){
oldcodes <- conditions
has.min <- paste(lapply(conditions[has.range],"[[",2)) == "min"
has.max <- paste(lapply(conditions[has.range],"[[",3)) == "max"
if(any(has.min)){
min.list <- list(min=min(x))
conditions[has.range][has.min] <- lapply(
conditions[has.range][has.min],
function(x) do.call("substitute",list(x,min.list))
)
}
if(any(has.max)){
max.list <- list(max=max(x))
conditions[has.range][has.max] <- lapply(
conditions[has.range][has.max],
function(x) do.call("substitute",list(x,max.list))
)
}
}
else
oldcodes <- sapply(conditions,eval)
NA_recoded <- any(unlist(suppressWarnings(sapply(oldcodes,is.na))))
conditions[has.range] <- lapply(conditions[has.range],
function(x)
as.call(list(as.symbol("&"),
as.call(list(as.symbol("<="),x[[2]],quote(x@.Data))),
as.call(list(as.symbol("<="),quote(x@.Data),x[[3]]))
)
))
conditions[!has.range] <- lapply(conditions[!has.range],
function(x)
as.call(list(as.symbol("%in%"),quote(x@.Data),x))
)
torecode <- sapply(conditions,eval,envir=environment(),enclos=parent.frame())
if(!is.matrix(torecode)) torecode <- t(torecode)
newcodes <- sapply(newcodes,eval,parent.frame())
nevtrue <- colSums(torecode) == 0
if(any(nevtrue)){
nrecng <- paste(recodings[nevtrue])
if(length(nrecng)>1)
warning("recodings ",paste(nrecng,collapse=", ")," have no consequences")
else
warning("recoding ",nrecng," has no consequences")
}
ambiguous <- rowSums(torecode) > 1
if(any(ambiguous))
stop("recoding request is ambiguous")
#y <- if(is.character(newcodes)) as.character(x) else x
y <- x
labels(y) <- NULL
if(is.character(newcodes) && is.numeric(y)) {
newcodes <- structure(
seq_along(newcodes),
names=newcodes
)
}
#newcodes <- newcodes[!nevtrue]
#torecode <- torecode[,!nevtrue,drop=FALSE]
for(i in seq(along=newcodes)){
if(!nevtrue[i])
y[torecode[,i]] <- as.vector(newcodes[i],mode=storage.mode(y))
}
if(!copy){
recoded <- as.logical(rowSums(torecode))
tmp <- as.vector(otherwise,mode=storage.mode(y))
length(otherwise) <- length(y)
otherwise[] <- tmp
y[!recoded] <- otherwise[!recoded]
nNA <-sum(is.na(otherwise[!recoded])) - sum(is.na(x[!recoded]))
if(nNA > 0)
warning("recoding created ",nNA," NAs")
if(!NA_recoded)
y[is.na(x)] <- NA
}
newvlab <- newcodes[nzchar(names(newcodes))]
bijective <- FALSE
lab.y <- lab.x <- labels(x)
if(!is.list(oldcodes)){
# This happens only in one-to-one recodings
if(length(oldcodes) == length(newcodes) &&
all(oldcodes %in% newcodes)){
if(copy) bijective <- TRUE
else if(length(lab.x) && all(lab.x@values %in% oldcodes))
bijective <- TRUE
}
}
if(length(lab.x) && bijective && !length(names(newcodes))){
ii <- match(oldcodes,lab.x@values)
jj <- match(newcodes,lab.y@values)
lab.y@.Data[jj] <- lab.x@.Data[ii]
labels(y) <- lab.y
}
else if(length(lab.x) && copy){
lab.y.val <- lab.y@values
lab.oldcodes <- lapply(conditions,Substitute,list(x=lab.y.val))
lab.torecode <- sapply(lab.oldcodes,eval,envir=environment(),enclos=parent.frame())
for(i in seq(along=newcodes)){
lab.y.val[lab.torecode[,i]] <- as.vector(newcodes[i],mode=storage.mode(lab.y.val))
}
lab.y.val <- sort(unique(lab.y.val))
ii <- match(lab.y.val,lab.y@values)
lab.y.lab <- lab.y@.Data[ii]
labels(y) <- new("value.labels",lab.y.lab,values=lab.y.val)
if(length(newvlab))
labels(y) <- labels(y) + newvlab
}
else if(length(newvlab)){
if(length(names(otherwise)))
newvlab <- new("value.labels",names(newvlab),values=newvlab) + otherwise
labels(y) <- newvlab
if(measurement(y) %in% c("interval","ratio"))
measurement(y) <- "nominal"
}
# else if(length(newvlab)){
# if(identical(otherwise,"copy"))
# labels(y) <- labels(y) + newvlab
# else
# labels(y) <- newvlab
# }
return(y)
})
setMethod("recode","vector",function(x,...,
copy=getOption("recode_copy",identical(otherwise,"copy")),
otherwise=NA){
call <- match.call()
if(length(otherwise)!=1) stop("otherwise= argument must have length 1")
if("recodes" %in% names(call)
|| is.character(call[[3]])
) {
return(car_recode(var=x,...))
}
recodings <- match.call(expand.dots=FALSE)$...
if("to.factor" %in% names(recodings)
&& is.logical(recodings[["to.factor"]])
) {
warning("'to.factor' argument no longer in use")
recodings["to.factor"] <- NULL
}
recodings <- recodings[nzchar(sapply(recodings,paste,collapse=""))]
if(any(sapply(sapply(recodings,"[[",1),paste)!="<-"))
stop("invalid recoding request")
if(!length(recodings)) return(x)
newcodes <- lapply(recodings,"[[",2)
oldcodes <- lapply(recodings,"[[",3)
NA_recoded <- any(unlist(suppressWarnings(sapply(oldcodes,is.na))))
has.range <- paste(lapply(oldcodes,"[[",1)) == "range"
if(any(has.range)){
has.min <- paste(lapply(oldcodes[has.range],"[[",2)) == "min"
has.max <- paste(lapply(oldcodes[has.range],"[[",3)) == "max"
if(any(has.min)){
min.list <- list(min=min(x, na.rm=TRUE))
oldcodes[has.range][has.min] <- lapply(
oldcodes[has.range][has.min],
function(x) do.call("substitute",list(x,min.list))
)
}
if(any(has.max)){
max.list <- list(max=max(x, na.rm=TRUE))
oldcodes[has.range][has.max] <- lapply(
oldcodes[has.range][has.max],
function(x) do.call("substitute",list(x,max.list))
)
}
}
oldcodes[has.range] <- lapply(oldcodes[has.range],
function(x)
as.call(list(as.symbol("&"),
as.call(list(as.symbol("<="),x[[2]],as.symbol("x"))),
as.call(list(as.symbol("<="),as.symbol("x"),x[[3]]))
)
))
oldcodes[!has.range] <- lapply(oldcodes[!has.range],
function(x)
as.call(list(as.symbol("%in%"),as.symbol("x"),x))
)
torecode <- sapply(oldcodes,eval,envir=environment())
if(!is.matrix(torecode)) torecode <- t(torecode)
newcodes <- sapply(newcodes,eval,parent.frame())
nevtrue <- colSums(torecode, na.rm=TRUE) == 0
if(any(nevtrue)){
nrecng <- paste(recodings[nevtrue])
if(length(nrecng)>1)
warning("recodings ",paste(nrecng,collapse=", ")," have no consequences")
else
warning("recoding ",nrecng," has no consequences")
}
ambiguous <- rowSums(torecode, na.rm=TRUE) > 1
if(any(ambiguous))
stop("recoding request is ambiguous")
y <- if(is.character(newcodes)) as.character(x) else x
newcodes <- newcodes[!nevtrue]
torecode <- torecode[,!nevtrue,drop=FALSE]
for(i in seq(along=newcodes)){
y[torecode[,i]] <- newcodes[i]
}
if(!copy){
if(is.character(otherwise)) newcodes <- c(newcodes, otherwise)
recoded <- as.logical(rowSums(torecode))
recoded[is.na(recoded)] <- TRUE
tmp <- as.vector(otherwise,mode=storage.mode(y))
length(otherwise) <- length(y)
otherwise[] <- tmp
y[!recoded] <- otherwise[!recoded]
nNA <- sum(is.na(otherwise[!recoded])) - sum(is.na(x[!recoded]))
if(nNA > 0)
warning("recoding created ",nNA," NAs")
if(!NA_recoded)
y[is.na(x)] <- NA
}
if(is.character(y)) {
levels <- sort(unique(y[y%nin%newcodes]))
levels <- c(newcodes,levels)
y <- factor(y,levels=levels)
}
return(y)
})
setMethod("recode","factor",function(x,...,copy=getOption("recode_copy",identical(otherwise,"copy")),
otherwise=NA){
recodings <- match.call(expand.dots=FALSE)$...
if(length(otherwise)!=1) stop("otherwise= argument must have length 1")
if("to.factor" %in% names(recodings)
&& is.logical(recodings[["to.factor"]])
) {
warning("'to.factor' argument no longer in use")
recodings["to.factor"] <- NULL
}
recodings <- recodings[nzchar(sapply(recodings,paste,collapse=""))]
if(any(sapply(sapply(recodings,"[[",1),paste)!="<-"))
stop("invalid recoding request")
if(!length(recodings)) return(x)
newcodes <- sapply(recodings,"[[",2)
if(copy)
newcodes <- as.character(newcodes) # 'copy=TRUE' requires the result also to be a factor ...
if(is.character(newcodes))
to_factor <- TRUE
else
to_factor <- FALSE
oldcodes <- lapply(recodings,"[[",3)
oldcodes <- lapply(oldcodes,eval,envir=environment())
torecode <- sapply(oldcodes,function(o) x %in% o)
if(!is.matrix(torecode)) torecode <- t(torecode)
nevtrue <- colSums(torecode) == 0
if(any(nevtrue)){
nrecng <- paste(recodings[nevtrue])
if(length(nrecng)>1)
warning("recodings ",paste(nrecng,collapse=", ")," have no consequences")
else
warning("recoding ",nrecng," has no consequences")
}
ambiguous <- rowSums(torecode) > 1
if(any(ambiguous))
stop("recoding request is ambiguous")
if(to_factor){
y <- integer(length=length(x))
for(i in 1:ncol(torecode)){
y[torecode[,i]] <- i
}
if(copy){
olevels <- levels(unique(x[y==0,drop=TRUE]))
max.y <- max(y)
for(i in seq(along=olevels)){
y[x == olevels[i]] <- max.y + i
}
y <- factor(y,levels=1:max(y),labels=c(newcodes,olevels))
}
else if(is.character(otherwise)){
max.y <- max(y)
y[y == 0] <- max.y + 1
y <- factor(y,levels=1:max(y),labels=c(newcodes,otherwise[1]))
}
else {
y <- factor(y,levels=1:max(y),labels=newcodes)
recoded <- as.logical(rowSums(torecode))
nNA <- sum(is.na(y[!recoded]) & !is.na(x[!recoded]))
if(nNA > 0)
warning("recoding created ",nNA," NAs")
}
}
else {
y <- vector(mode=storage.mode(newcodes),
length=length(x))
for(i in 1:ncol(torecode))
y[torecode[,i]] <- newcodes[i]
recoded <- as.logical(rowSums(torecode))
recoded[is.na(recoded)] <- TRUE
tmp <- as.vector(otherwise,mode=storage.mode(y))
length(otherwise) <- length(y)
otherwise[] <- tmp
y[!recoded] <- otherwise[!recoded]
nNA <- sum(is.na(y[!recoded]) & !is.na(x[!recoded]))
if(nNA > 0)
warning("recoding created ",nNA," NAs")
}
return(y)
})
|
