Check whether the options for latex functions have been specified.

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.

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.

Author

Richard M. Heiberger <rmh@temple.edu>

See also

latex