2018-08-10 15:01:05 +02:00
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# ==================================================================== #
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# TITLE #
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# Antimicrobial Resistance (AMR) Analysis #
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# #
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# AUTHORS #
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# Berends MS (m.s.berends@umcg.nl), Luz CF (c.f.luz@umcg.nl) #
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# #
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# LICENCE #
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# This program is free software; you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License version 2.0, #
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# as published by the Free Software Foundation. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# ==================================================================== #
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#' Count cases with antimicrobial results
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#'
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#' This counts all cases where antimicrobial interpretations are available. Its use is equal to \code{\link{n_distinct}}.
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#' @param ab1,ab2 vector of antibiotic interpretations, they will be transformed internally with \code{\link{as.rsi}} if needed
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#' @export
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#' @seealso The \code{\link{portion}} functions to calculate resistance and susceptibility.
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#' @examples
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#' library(dplyr)
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#'
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#' septic_patients %>%
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#' group_by(hospital_id) %>%
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#' summarise(cipro_p = portion_S(cipr, as_percent = TRUE),
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#' cipro_n = n_rsi(cipr),
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#' genta_p = portion_S(gent, as_percent = TRUE),
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#' genta_n = n_rsi(gent),
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#' combination_p = portion_S(cipr, gent, as_percent = TRUE),
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#' combination_n = n_rsi(cipr, gent))
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n_rsi <- function(ab1, ab2 = NULL) {
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if (NCOL(ab1) > 1) {
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2018-08-12 17:44:06 +02:00
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stop('`ab1` must be a vector of antimicrobial interpretations', call. = FALSE)
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2018-08-10 15:01:05 +02:00
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}
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if (!is.rsi(ab1)) {
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ab1 <- as.rsi(ab1)
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}
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if (!is.null(ab2)) {
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if (NCOL(ab2) > 1) {
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stop('`ab2` must be a vector of antimicrobial interpretations', call. = FALSE)
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}
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if (!is.rsi(ab2)) {
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ab2 <- as.rsi(ab2)
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}
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sum(!is.na(ab1) & !is.na(ab2))
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} else {
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sum(!is.na(ab1))
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}
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}
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