AMR/R/disk.R

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# ==================================================================== #
# TITLE #
# Antimicrobial Resistance (AMR) Analysis #
# #
# SOURCE #
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# https://github.com/msberends/AMR #
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# #
# LICENCE #
# (c) 2018-2020 Berends MS, Luz CF et al. #
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# #
# This R package is free software; you can freely use and distribute #
# it for both personal and commercial purposes under the terms of the #
# GNU General Public License version 2.0 (GNU GPL-2), as published by #
# the Free Software Foundation. #
# #
# We created this package for both routine data analysis and academic #
# research and it was publicly released in the hope that it will be #
# useful, but it comes WITHOUT ANY WARRANTY OR LIABILITY. #
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# Visit our website for more info: https://msberends.github.io/AMR. #
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# ==================================================================== #
#' Class 'disk'
#'
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#' This transforms a vector to a new class [`disk`], which is a growth zone size (around an antibiotic disk) in millimetres between 6 and 50.
#' @inheritSection lifecycle Stable lifecycle
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#' @rdname as.disk
#' @param x vector
#' @param na.rm a logical indicating whether missing values should be removed
#' @details Interpret disk values as RSI values with [as.rsi()]. It supports guidelines from EUCAST and CLSI.
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#' @return An [`integer`] with additional new class [`disk`]
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#' @aliases disk
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#' @export
#' @seealso [as.rsi()]
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#' @inheritSection AMR Read more on our website!
#' @examples
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#' \dontrun{
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#' # transform existing disk zones to the `disk` class
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#' library(dplyr)
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#' df <- data.frame(microorganism = "E. coli",
#' AMP = 20,
#' CIP = 14,
#' GEN = 18,
#' TOB = 16)
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#' df <- df %>% mutate_at(vars(AMP:TOB), as.disk)
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#' df
#'
#' # interpret disk values, see ?as.rsi
#' as.rsi(x = as.disk(18),
#' mo = "Strep pneu", # `mo` will be coerced with as.mo()
#' ab = "ampicillin", # and `ab` with as.ab()
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#' guideline = "EUCAST")
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#'
#' as.rsi(df)
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#' }
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as.disk <- function(x, na.rm = FALSE) {
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if (!is.disk(x)) {
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x <- x %>% unlist()
if (na.rm == TRUE) {
x <- x[!is.na(x)]
}
x.bak <- x
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na_before <- length(x[is.na(x)])
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# force it to be integer
x <- suppressWarnings(as.integer(x))
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# disks can never be less than 6 mm (size of smallest disk) or more than 50 mm
x[x < 6 | x > 50] <- NA_integer_
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na_after <- length(x[is.na(x)])
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if (na_before != na_after) {
list_missing <- x.bak[is.na(x) & !is.na(x.bak)] %>%
unique() %>%
sort()
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list_missing <- paste0('"', list_missing, '"', collapse = ", ")
warning(na_after - na_before, " results truncated (",
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round(((na_after - na_before) / length(x)) * 100),
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"%) that were invalid disk zones: ",
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list_missing, call. = FALSE)
}
}
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structure(as.integer(x),
class = c("disk", "integer"))
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}
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all_valid_disks <- function(x) {
x_disk <- suppressWarnings(as.disk(x[!is.na(x)]))
!any(is.na(x_disk)) & !all(is.na(x))
}
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#' @rdname as.disk
#' @export
is.disk <- function(x) {
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inherits(x, "disk")
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}
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#' @method print disk
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#' @export
#' @noRd
print.disk <- function(x, ...) {
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cat("Class <disk>\n")
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print(as.integer(x), quote = FALSE)
}
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#' @method [ disk
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#' @export
#' @noRd
"[.disk" <- function(x, ...) {
y <- NextMethod()
attributes(y) <- attributes(x)
y
}
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#' @method [[ disk
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#' @export
#' @noRd
"[[.disk" <- function(x, ...) {
y <- NextMethod()
attributes(y) <- attributes(x)
y
}
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#' @method [<- disk
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#' @export
#' @noRd
"[<-.disk" <- function(i, j, ..., value) {
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value <- as.disk(value)
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y <- NextMethod()
attributes(y) <- attributes(i)
y
}
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#' @method [[<- disk
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#' @export
#' @noRd
"[[<-.disk" <- function(i, j, ..., value) {
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value <- as.disk(value)
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y <- NextMethod()
attributes(y) <- attributes(i)
y
}
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#' @method c disk
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#' @export
#' @noRd
c.disk <- function(x, ...) {
y <- NextMethod()
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y <- as.disk(y)
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attributes(y) <- attributes(x)
y
}