R: Check whether the options for latex functions have been...
latexCheckOptions
R Documentation
Check whether the options for latex functions have been specified.
Description
Check whether the options for latex functions have been specified.
If any of options()[c("latexcmd","dviExtension","xdvicmd")]
are NULL, an error message is displayed.
Usage
latexCheckOptions(...)
Arguments
...
Any arguments are ignored.
Value
If any NULL options are detected, the invisible text of the
error message. If all three options have non-NULL values, NULL.