Nothing
# setMethod("as.POSIXct","numeric.item",function(x,...){
# as.POSIXct(x@.Data,...)
# })
as.POSIXct.datetime.item <- function(x, tz = "", ...){
origin <- if(is.null(x@origin)) "1970-01-01" else x@origin
if(missing(tz)) {
tz <- if(is.character(x@tzone)) x@tzone else "GMT"
}
as.POSIXct(x@.Data,
tz=tz,
origin=origin)
}
setMethod("as.item","POSIXct",function(x,...){
new("datetime.item",as.numeric(x),tzone=attr(x,"tzone"),...)
})
setMethod("as.item","datetime.item",as_item_item)
as.data.frame.datetime.item <- function (x, row.names = NULL, optional = FALSE, ...)
{
nrows <- length(x)
nm <- paste(deparse(substitute(x), width.cutoff = 500), collapse = " ")
if (is.null(row.names)) {
if (nrows == 0L)
row.names <- character(0L)
else row.names <- .set_row_names(nrows)
}
x <- as.POSIXct.datetime.item(x)
value <- list(x)
if (!optional)
names(value) <- nm
attr(value, "row.names") <- row.names
class(value) <- "data.frame"
value
}
str.datetime.item <- function(object,give.head=TRUE,width=getOption("width"),...){
if(give.head){
hdr <- " Date-time item"
cat(hdr,"")
}
str(as.POSIXct.datetime.item(object),give.head=FALSE,width=width,...)
}
format.datetime.item <- function(x,justify="right",format="",tz="",usetz=FALSE,...){
if (missing(tz) && !is.null(tzone <- attr(x, "tzone"))) tz <- tzone
format(as.POSIXct.datetime.item(x),format=format,tz=tz,usetz=usetz,...)
}
setMethod("format","datetime.item",format.datetime.item)
print.datetime.item <- function(x,
use.labels=isTRUE(getOption("print.use.value.labels")),
width=getOption("width"),
compress=FALSE,
usetz=TRUE,...,print.gap=NULL){
if(length(x)){
mkdots <- function(n) paste(rep(".",n),collapse="")
pg <- if(is.null(print.gap) || compress) 1 else print.gap
l <- length(x)
if(compress) {
x <- x[seq_len(min(width,l))]
x <- format(x,usetz=usetz,...)
x <- trimws(x)
xw <- cumsum(nchar(x,"w")+1)
hdr <- paste(" [","1:",length(x),"]",sep="")
width <- width - nchar(hdr)
if(any(xw > width)){
dots <- mkdots(3)
width <- width - nchar(dots,"w") - 1
upto <- max(which(xw <= width))
x <- trimws(format(c(x[seq_len(upto)],dots)))
}
cat(hdr,x)
cat("\n")
}
else
print.default(
format(x,usetz=usetz,...),
quote=FALSE,print.gap=print.gap)
}
else
print(as.POSIXct.datetime.item(x),print.gap=print.gap)
}
setMethod("show","datetime.item",function(object){
cat("\nDate/time item",
if(length(description(object))) sQuote(description(object)) else NULL,
paste("(",
"length = ",length(object),
", time zone = ",object@tzone,
")",sep=""),
"\n\n")
print.datetime.item(object,width=getOption("width"),compress=TRUE,usetz=FALSE)
})
setMethod("print","datetime.item",print.datetime.item)
setMethod("summary","datetime.item",function(object,...,maxsum=100,digits=3){
ism <- is.missing(object)
xvalid <- as.POSIXct.datetime.item(object[!ism])
summary(xvalid)
})
setMethod("codebookEntry","datetime.item",function(x){
annotation <- annotation(x)
filter <- x@value.filter
spec <- c(
"Storage mode:"=storage.mode(x),
"Measurement:"="Date/time"
)
if(length(filter)) spec <- c(spec,
switch(class(filter),
missing.values = c("Missing values:" = format(filter)),
valid.values = c("Valid values:" = format(filter)),
valid.range = c("Valid range:" = format(filter))
))
ism <- is.missing(x)
isna <- is.na(x)
new("codebookEntry",
spec = spec,
stats = list(
descr=format(summary(x)),
`N.miss.` = sum(ism & !isna),
NAs = sum(isna)
),
annotation = annotation
)
})
xtfrm.datetime.item <- function(x) x@.Data
setMethod("as.character","datetime.item",function(x,...)
format(as.POSIXct.datetime.item(x))
)
unique.datetime.item <- unique.item.vector
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