define_macro: Define a user-level LaTeX macro

In gridmicrotex: Native 'LaTeX' Math Rendering for Grid Graphics

Define a user-level LaTeX macro

Description

Registers a zero-argument shorthand that is expanded by text substitution before the expression reaches the MicroTeX parser. Useful for domain-specific notation (e.g. \RR for \mathbb{R}) you reuse across many plots.

Usage

define_macro(name, definition)

clear_macros(name = NULL)

list_macros()

Arguments

name	Macro name without the leading backslash. For clear_macros, the macro name to drop, or NULL (default) to clear all.
definition	LaTeX source the macro expands to.

Value

• define_macro: Invisibly returns NULL.

• clear_macros: Invisibly returns NULL.

• list_macros: A named character vector mapping macro names to their expansions. Empty if no macros are defined.

See Also

latex_grob, latex_options

Examples

  define_macro("RR", "\\mathbb{R}")
  define_macro("eps", "\\varepsilon")
  grid::grid.newpage()
  grid.latex("\\forall \\eps > 0, \\eps \\in \\RR")
  clear_macros()

gridmicrotex documentation built on May 16, 2026, 5:06 p.m.