R/asNumeric.R

In admisc: Adrian Dusa's Miscellaneous

# Copyright (c) 2019 - 2023, Adrian Dusa
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# 
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`asNumeric` <- function(x, ...) {
    UseMethod("asNumeric")
}
`asNumeric.declared` <- function(x, ..., na_values = TRUE) {
    na_index <- attr(x, "na_index")
    attributes(x) <- NULL
    if (isTRUE(na_values)) {
        if (!is.null(na_index)) {
            x[na_index] <- as.numeric(names(na_index))
        }
    }
    NextMethod()
}
`asNumeric.factor` <- function(x, ..., levels = TRUE) {
    if (isTRUE(levels)) {
        return(suppressWarnings(as.numeric(levels(x)))[x])
    }
    return(as.numeric(x))
}
`asNumeric.default` <- function(x, ...) {
    attributes(x) <- NULL
    if (is.numeric(x)) {
        return(x)
    }
    x <- gsub("\u00a0", " ", x) 
    result <- rep(NA, length(x))
    multibyte <- grepl("[^!-~ ]", x)
    result[!multibyte] <- suppressWarnings(as.numeric(x[!multibyte]))
    return(result)
}