safe_eval: Safely eval a string as an expression

In r-cas/iomath: Input/Output Tools for Handling Symbolic Math

Description

Safely eval a string as an expression

Usage

safe_eval(
  x,
  vars = NULL,
  replace_comma = TRUE,
  insert_products = TRUE,
  allowed_functions = getGroupMembers("Math"),
  allowed_constants = c("pi")
)

Arguments

x	string to evaluate
vars	list with variable values
replace_comma	Replace ',' with '.' before parsing
insert_products	Make implicit products explicit
allowed_functions	functions (sequence of characters) that should not have products, e.g. cos, sin

Examples

safe_eval("2+2")

r-cas/iomath documentation built on May 28, 2021, 11:10 p.m.