R/idx2aref.R

In XLConnect: Excel Connector for R

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#
# XLConnect
# Copyright (C) 2010-2021 Mirai Solutions GmbH
#
# This program is free software: you can redistribute it and/or modify
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#
# Converting row and column based area references to Excel area references
# 
# Author: Martin Studer, Mirai Solutions GmbH
#
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idx2aref <- function(x) {
	if(!is.numeric(x)) stop("x must be a numeric matrix or vector of indices!")
	if(!is.matrix(x)) x <- matrix(x, ncol = 4, byrow = TRUE)
	apply(x, 1, function(xx) {
		paste(
			idx2cref(xx[1:2], absRow = FALSE, absCol = FALSE),
			idx2cref(xx[3:4], absRow = FALSE, absCol = FALSE),
			sep = ":")
	})
}