R: Reorder unary oparators

unary_reorder_expr {lazy.symbolic}

R Documentation

Reorder unary oparators

Description

Japanese help file: unary_reorder_expr_JPH

Usage

unary_reorder_expr(
  expr,
  most_out,
  add_exch_op,
  exchangable_ops = c("inv", "(", "t", "-")
)

Arguments

expr

input expression or string

most_out

The unary operator that should be moved to the outermost position.

add_exch_op

(optional) An additional unary operator to be added to the set of exchangeable operators. This is useful if you have custom unary operators.

exchangable_ops

A vector of unary operators that can be exchanged. The default is 'c("inv", "(", "t", "-")'.

Details

This function is used to move unary operators (e.g., 'inv', 't', '-') to the outermost position in an expression, as much as possible. It is useful for handling nested unary operators or when you want to prioritize moving specific operators outward.

Value

an expression

Examples


modify_math_operators()
unary_reorder_expr("(t(inv(A)))", "inv")
unary_reorder_expr("(t(-(inv(A))))", "inv")
unary_reorder_expr("t(-(gune(A)))", "gune")
unary_reorder_expr("gune(t(-(inv(A))))", "inv")
unary_reorder_expr("(t(B + (inv(A))))", "inv")

unary_reorder_expr("t(-(gune(A)))", "gune", add_exch_op = "gune")
unary_reorder_expr("gune(t(-(inv(A))))", "inv", add_exch_op = "gune")

unary_reorder_expr("t(-(t(-(inv(A)))))", "inv"
, exchangable_ops = c("-", "(", "inv"))

unary_reorder_expr("t(inv(A))", "t")
unary_reorder_expr("inv(t(-(B)) - A)", "-")

[Package lazy.symbolic version 1.0.0.20250830 ]