input TeX package name and optional package functions to create usepackage call
build_usepackage(pkg, options = NULL, uselibrary = NULL, chk.inst = FALSE)character, name of TeX package
character, name(s) of options to use in the package
character, part of document preamble to specify a uselibrary call related to package
logical, invokes a check to see if pkg is currently installed on system (default FALSE)
character
if options and uselibrary are NULL (default) then only the call for the package is returned. See the TeX wikibook for more information https://en.wikibooks.org/wiki/LaTeX/Document_Structure#Packages on the usepackage command. If chk.inst finds that the package is not installed on system function returns NULL.
build_usepackage(pkg = 'xcolor')
#> [1] "\\usepackage{xcolor}"
build_usepackage(pkg = 'xcolor',options = 'usenames')
#> [1] "\\usepackage[usenames]{xcolor}"
#build many at once using mapply
geom.opts=c('paperwidth=35cm','paperheight=35cm','left=2.5cm','top=2.5cm')
use.opts="\\usetikzlibrary{mindmap,backgrounds}"
unlist(mapply(build_usepackage,
pkg = list('times','geometry','tikz'),
options= list(NULL ,geom.opts ,NULL),
uselibrary = list(NULL ,NULL ,use.opts)
))
#> [1] "\\usepackage{times}"
#> [2] "\\usepackage[paperwidth=35cm,paperheight=35cm,left=2.5cm,top=2.5cm]{geometry}"
#> [3] "\\usepackage{tikz}"
#> [4] "\\usetikzlibrary{mindmap,backgrounds}"