The conversion key tables are included in the code of the function
markupConvert(marked, type = c("latex", "html", "csv"), longtable = FALSE,
file = NULL, columns)
A character string
Output type, can be a vector or any one of "latex", "html", and "csv".
should a tabular or a longtable object be created?
A file stub, to which ".tex", ".html", or ".csv" can be added
For SEM table, the list of columns objects
a list of marked up character objects