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# Originally from Marc Schwarz
# Ref: http://tolstoy.newcastle.edu.au/R/e6/help/09/01/1873.html
# 23 Feb 22: Fix warning from type.convert
expand.dft <- function(x, var.names = NULL, freq = "Freq", ...)
{
# allow: a table object, or a data frame in frequency form
if(inherits(x, "table"))
x <- as.data.frame.table(x, responseName = freq)
freq.col <- which(colnames(x) == freq)
if (length(freq.col) == 0)
stop(paste(sQuote("freq"), "not found in column names"))
DF <- sapply(1:nrow(x),
function(i) x[rep(i, each = x[i, freq.col, drop = TRUE]), ],
simplify = FALSE)
DF <- do.call("rbind", DF)[, -freq.col, drop=FALSE]
for (i in 1:ncol(DF))
{
DF[[i]] <- type.convert(as.character(DF[[i]]), as.is=TRUE, ...)
## DONE ##: Generates warning:
## 1: In type.convert.default(as.character(DF[[i]]), ...) :
## 'as.is' should be specified by the caller; using TRUE
}
rownames(DF) <- NULL
if (!is.null(var.names))
{
if (length(var.names) < dim(DF)[2])
{
stop(paste("Too few", sQuote("var.names"), "given."))
} else if (length(var.names) > dim(DF)[2]) {
stop(paste("Too many", sQuote("var.names"), "given."))
} else {
names(DF) <- var.names
}
}
DF
}
# make this a synonym
expand.table <- expand.dft
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