| Detailed description |
In the below document, xtable emits a warning `Nonstandard alignments in align string`. However, the align arguments are correct, in context.
\documentclass{article}
\usepackage{tabularx}
\newcolumntype{R}{>{\raggedleft\arraybackslash}X}
\begin{document}
<<a-tablularx, results='asis'>>=
library(xtable)
xtable(data.frame(x = "a", y = 1, z = 2), align = "lXRR")
@
\end{document}
I would like to propose a new package option `xtable.alignAllowedExtra` together with a single line of code change, viz. line 76 in R/table.attributes.R from
alignAllowed <- c("l","r","p","c","|","X")
to
alignAllowed <- c("l","r","p","c","|","X", getOption("xtable.alignAllowedExtra"))
So that users can set, for example,
options("xtable.alignAllowedExtra" = "R")
in their preamble to allow any new column types to be set without emitting a warning. This change would be backwards-compatible.
Currently, to avoid the warning I have to surround each xtable call with suppressWarnings (which is inconvenient and risks suppressing other warnings) or use `assignInNamespace` (which is prohibited in package code).
Thank you for a fantastic package!
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