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##################################################
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################## int2padstr ####################
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##################################################
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int2padstr <- function (ii, pchr, w) {
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## Description:
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## Converts an integer or a vector of integers to
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## a string padded with characters.
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## Usage:
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## int2padstr(ii, pchr, w)
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## Arguments:
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## ii: integer or vector of integers
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## pchr: a padding character (e.g., "0")
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## w: width of the return string (an integer)
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## Make sure to set the width longer than
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## or equal to the length of the biggest integer.
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## For example, if the integers (ii) are
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## in the range 1 - 100, set w to at least 3.
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## Value:
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## A character string or a vector of character strings
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gsub(" ", pchr, formatC(ii, format="s", mode="character", width = w))
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}
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