R: Reorder unary oparators

unary_reorder_expr {lazy.symbolic}

R Documentation

Reorder unary oparators

Description

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.

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

元のunary_reorder_exprはdeprecate予定

Value

an expression

Note

再帰解決系

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 1.0.0.20250803 ]