https://github.com/cran/simPopulation
Tip revision: 4b3459664d72206998e408f5d33f4ba48bb6e0d5 authored by Andreas Alfons on 13 July 2010, 00:00:00 UTC
version 0.1.3
version 0.1.3
Tip revision: 4b34596
tableWt.R
# ----------------------------------------
# Authors: Stefan Kraft and Andreas Alfons
# Vienna University of Technology
# ----------------------------------------
tableWt <- function(x, weights = NULL) {
# initializations
if(!is.data.frame(x)) x <- as.data.frame(x)
if(is.null(weights)) return(table(x))
else if(!is.numeric(weights)) stop("'weights' must be a numeric vector")
else if(length(weights) != nrow(x)) {
stop("length of 'weights' must equal the number of rows in 'x'")
} else if(!all(is.finite(weights))) stop("missing or infinite weights")
# compute and return weighted table
tab <- round(tapply(weights, x, sum))
tab[is.na(tab)] <- 0
class(tab) <- "table"
return(tab)
}