## $Id$
.valueTagAttrs <- c(label="label", units="units", name="shortlabel")
valueTags <- function(x)
attributes(x)[names(attributes(x)) %in% .valueTagAttrs]
"valueTags<-" <- function(x, value) {
if(is.null(value) || length(value) == 0) {
attributes(x)[names(attributes(x)) %in% .valueTagAttrs] <- NULL
class(x) <- class(x)[class(x) != 'labelled']
return(x)
}
if(!is.list(value)) {
stop("list must be a named list of valueTags")
}
value[(!names(value) %in% .valueTagAttrs) |
unlist(lapply(value, is.null))] <- NULL
if(length(value) == 0) {
attributes(x)[names(attributes(x)) %in% .valueTagAttrs] <- NULL
class(x) <- class(x)[class(x) != 'labelled']
return(x)
}
attributes(x)[setdiff(names(attributes(x))[names(attributes(x)) %in%
.valueTagAttrs],
names(value))] <- NULL
consolidate(attributes(x)) <- value
if(all(class(x) != 'labelled'))
class(x) <- c('labelled', class(x))
return(x)
}
valueLabel <- function(x)
attr(x, 'label')
"valueLabel<-" <- function(x, value) {
if(!is.character(value) || length(value) != 1)
stop("value label must be a character vector of length 1")
attr(x, 'label') <- value
class(x) <- c('labelled', class(x)[class(x) != 'labelled'])
return(x)
}
valueUnit <- function(x)
attr(x, 'units')
"valueUnit<-" <- function(x, value) {
if(!is.character(value) || length(value) != 1)
stop("value unit must be a character vector of length 1")
attr(x, 'units') <- value
class(x) <- c('labelled', class(x)[class(x) != 'labelled'])
return(x)
}
valueName <- function(x)
attr(x, 'valueName')
"valueName<-" <- function(x, value) {
if(!is.character(value) || length(value) != 1)
stop("value name must be a character vector of length 1")
attr(x, 'valueName') <- value
class(x) <- c('labelled', class(x)[class(x) != 'labelled'])
return(x)
}
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