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Support for objects from 'tibble' and 'haven'
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| setGeneric("prep_for_tibble",function(x,...)standardGeneric("prep_for_tibble")) | ||
| setMethod("prep_for_tibble",signature(x="item.vector"),function(x,...) | ||
| prep_for_tibble_item_vector(x)) | ||
|
|
||
| prep_for_tibble_item_vector <- function(x,...){ | ||
| y <- if(inherits(x,"character.item")) as.character(x) | ||
| else if(is.ordinal(x)) as.ordered(x) | ||
| else if(is.nominal(x)) as.factor(x) | ||
| else as.vector(x) | ||
| d <- description(x) | ||
| if(length(d)) | ||
| attr(y,"label") <- d | ||
| return(y) | ||
| } | ||
|
|
||
| as_tibble.data.set <- function(x, ...){ | ||
| y <- lapply(x@.Data, | ||
| prep_for_tibble_item_vector) | ||
| names(y) <- names(x) | ||
| attr(y,"row.names") <- x@row_names | ||
| class(y) <- c("tbl_df","tbl","data.frame") | ||
| return(y) | ||
| } | ||
|
|
||
| setOldClass("haven_labelled") | ||
| setMethod("as.item",signature(x="haven_labelled"),function(x,...){ | ||
| annotation <- c(description=attr(x,"label")) | ||
| labels <- attr(x,"labels") | ||
| class(x) <- NULL | ||
| as.item(x,labels=labels, | ||
| annotation=annotation) | ||
| }) | ||
|
|
||
| setOldClass("haven_labelled_spss") | ||
| setMethod("as.item",signature(x="haven_labelled_spss"),function(x,...){ | ||
| annotation <- c(description=attr(x,"label")) | ||
| labels <- attr(x,"labels") | ||
| mis_range <- attr(x,"na_range") | ||
| mis_values <- attr(x,"na_values") | ||
| class(x) <- NULL | ||
| value_filter <- new("missing.values", | ||
| filter=mis_values, | ||
| range=mis_range) | ||
| as.item(x,labels=labels, | ||
| annotation=annotation, | ||
| value.filter=value_filter) | ||
| }) | ||
|
|
||
| setGeneric("as_haven",function(x,...)standardGeneric("as_haven")) | ||
| setMethod("as_haven",signature(x="data.set"),function(x,user_na=FALSE,...){ | ||
| y <- lapply(x@.Data,as_haven,user_na=user_na,...) | ||
| names(y) <- names(x) | ||
| attr(y,"row.names") <- x@row_names | ||
| class(y) <- c("tbl_df","tbl","data.frame") | ||
| return(y) | ||
| }) | ||
| setMethod("as_haven",signature(x="item.vector"),function(x,user_na=FALSE,...){ | ||
| y <- x@.Data | ||
| attr(y,"label") <- description(x) | ||
| attr(y,"labels") <- as.vector(labels(x)) | ||
| ms <- missing.values(x) | ||
| if(user_na && length(ms)){ | ||
| attr(y,"na_values") <- ms@filter | ||
| attr(y,"na_range") <- ms@range | ||
| class(y) <- "haven_labelled_spss" | ||
| } else { | ||
| ism <- is.missing(x) | ||
| y[ism] <- NA | ||
| class(y) <- "haven_labelled" | ||
| } | ||
| return(y) | ||
| }) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| \name{tibbles} | ||
| \alias{as_tibble.data.set} | ||
| \alias{as.item,haven_labelled-method} | ||
| \alias{as.item,haven_labelled_spss-method} | ||
| \alias{as_haven} | ||
| \alias{as_haven,data.set-method} | ||
| \alias{as_haven,item.vector-method} | ||
| \title{Interface to packages 'tibble' and 'haven'} | ||
| \description{ | ||
| A \code{as_tibble} method (\code{as_table.data.set}) allows to transform \code{"data.set"} objects | ||
| into objects of class \code{"tbl_df"} as defined by the package | ||
| "tibble". | ||
|
|
||
| \code{as.item} methods for objects of classes \code{"haven_labelled"} | ||
| and \code{"have_labelled_spss"} allow to transform a "tibble" imported | ||
| using \code{read_dta}, \code{read_spss}, etc. from the package "haven" | ||
| into an object of class \code{"data.set"}. | ||
|
|
||
| \code{as_haven} can be used to transform \code{"data.set"} objects | ||
| into objects of class \code{"tbl_df"} with that additional information | ||
| that objects imported using the "haven" package usually have, i.e. | ||
| variable labels and value labels (as the \code{"label"} and | ||
| \code{"labels"} attributes of the columns). | ||
| } | ||
| \usage{ | ||
| as_tibble.data.set(x,\dots) | ||
| \S4method{as.item}{haven_labelled}(x,\dots) | ||
| \S4method{as.item}{haven_labelled_spss}(x,\dots) | ||
| as_haven(x,\dots) | ||
| \S4method{as_haven}{data.set}(x,user_na=FALSE,\dots) | ||
| \S4method{as_haven}{item.vector}(x,user_na=FALSE,\dots) | ||
| } | ||
| \arguments{ | ||
| \item{x}{for \code{as_tibble.data.set} and \code{as_haven}, an object | ||
| of class \code{"data.set"}; for \code{as.item}, an object of class | ||
| \code{"haven_labelled"} or \code{"haven_labelled_spss"}.} | ||
| \item{user_na}{logical; if \code{TRUE} then the resulting vectors | ||
| have an \code{"na_values"} and/or \code{"na_range"} attribute.} | ||
| \item{\dots}{further arguments, passed through to other the the | ||
| \code{as_tibble} method for lists, or ignored.} | ||
| } | ||
| \value{ | ||
| \code{as_tibble.data.set} and the \code{"data.set"}-method of | ||
| \code{as_haven} return a "tibble". The \code{"item.vector"}-method | ||
| (which is for internal use only) returns a vector with S3 class either | ||
| \code{"haven_labelled"} or \code{"haven_labelled_spss"}. | ||
| } |