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##' Compute frequencies
##'
##' @param x factor
##' @param useNA useNA
##' @param propNA propNA
##' @param cum logical
##' @param addmargins addmargins
##' @author David Hajage
##' @keywords internal
freq <- function(x, useNA = c("no", "ifany", "always"), propNA = TRUE, cum = FALSE, addmargins = FALSE) {
rnames <- as.character(as.list(substitute(list(x)))[-1])
n <- n.table(x, useNA = useNA, margin = 0, addmargins = addmargins)
p <- p.table(x, useNA = useNA, propNA = propNA, margin = 0, addmargins = FALSE)[[1]]
if (addmargins)
p <- as.table(c(p, Total = 1))
if (cum) {
n.cum <- cumsum(n)
p.cum <- cumsum(p)
} else {
n.cum <- NULL
p.cum <- NULL
}
results <- cbind(n, p, n.cum, p.cum)
attr(results, "lgroup") <- list(names(n), rnames)
attr(results, "n.lgroup") <- list(1, nrow(results))
class(results) <- c("freq", "matrix")
results
}
##' Compute frequencies (data.frame input)
##'
##' @importFrom Hmisc label
##' @param df data.frame
##' @param useNA useNA
##' @param propNA propNA
##' @param cum logical
##' @author David Hajage
##' @keywords internal
freq.data.frame <- function(df, useNA = c("no", "ifany", "always"), propNA = TRUE, cum = FALSE, addmargins = FALSE, label = FALSE) {
if (cum)
addmargins <- FALSE
dfl <- as.list(df)
if (!label)
rnames <- names(dfl)
else
rnames <- sapply(dfl, Hmisc:::label.default)
results <- lapply(dfl, freq, useNA = useNA, propNA = propNA, cum = cum, addmargins = addmargins)
nrows <- sapply(results, nrow)
results <- rbind.list(results)
attr(results, "n.lgroup") <- list(1, nrows)
attr(results, "lgroup") <- list(unlist(lapply(df, function(x) {
if (useNA[1] == "always" | ((useNA[1] == "ifany") & any(is.na(x))))
lev <- levels(addNA(x))
else
lev <- levels(x)
if (addmargins)
lev <- c(lev, "Total")
lev})), rnames)
class(results) <- c("freq", "matrix")
attr(results, "df") <- df
results
}
##' Ascii for freq object.
##'
##' Ascii method for freq object (internal).
##'
##' @export
##' @method ascii freq
##' @import ascii
##' @param x a freq object
##' @param format see \code{?ascii} in \code{ascii} package
##' @param digits see \code{?ascii} in \code{ascii} package
##' @param include.rownames see \code{?ascii} in \code{ascii} package
##' @param rownames see \code{?ascii} in \code{ascii} package
##' @param include.colnames see \code{?ascii} in \code{ascii} package
##' @param header see \code{?ascii} in \code{ascii} package
##' @param lgroup see \code{?ascii} in \code{ascii} package
##' @param n.lgroup see \code{?ascii} in \code{ascii} package
##' @param ... other arguments passed to \code{ascii}
##' @author David Hajage
##' @keywords univar
ascii.freq <- function(x, format = "nice", digits = 3, include.rownames = FALSE, include.colnames = TRUE, header = TRUE, lgroup = attr(x, "lgroup"), n.lgroup = attr(x, "n.lgroup"), ...) {
class(x) <- class(x)[-1]
ascii(x, include.colnames = include.colnames, include.rownames = include.rownames, header = header, lgroup = lgroup, n.lgroup = n.lgroup, format = format, digits = digits, ...)
}
##' Print freq object.
##'
##' Print freq object (internal).
##'
##' @export
##' @import ascii
##' @method print freq
##' @param x a freq object
##' @param type type of output (see \code{?ascii} in \code{ascii}
##' package)
##' @param lstyle see \code{?ascii} in \code{ascii} package
##' @param ... other arguments passed to \code{ascii}
##' @author David Hajage
##' @keywords univar
print.freq <- function(x, type = "rest", lstyle = "", ...) {
print(ascii.freq(x, lstyle = lstyle, ...), type = type)
invisible(x)
}
##' as.data.frame for freq object.
##'
##' as.data.frame for freq object (internal).
##'
##' @export
##' @param x a freq object
##' @param ... not used
##' @author David Hajage
##' @keywords internal
as.data.frame.freq <- function(x, ...) {
xx <- unclass(x)
var <- unlist(mapply(rep, attr(x, "lgroup")[[2]], attr(x, "n.lgroup")[[2]], SIMPLIFY = FALSE))
levels <- attr(x, "lgroup")[[1]]
data.frame(var = var, levels = levels, xx, row.names = NULL, check.names = FALSE)
}
##' Test if \code{x} is an freq object
##'
##' @export
##' @param x a freq object
is.freq <- function(x)
inherits(x, "freq")
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