Convert a String to an Expression in R Programming - parse() Function
Last Updated :
24 Jun, 2020
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parse() function in R Language is used to convert an object of character class to an object of expression class.
Syntax: parse(text = character) Parameters: character: Object of character classExample 1:
# R program to convert
# character to expression
# Creating an object of character class
x <- "sin(pi / 2)"
# Class of object
class(x)
# Calling parse() Function
x1 <- parse(text = x)
# Class of parsed object
class(x1)
[1] "character" [1] "expression"Example 2:
# R program to convert
# character to expression
# Creating an object of character class
x <- "2 ^ 3"
# Evaluating the value of object
eval(x)
# Calling parse() Function
x1 <- parse(text = x)
# Evaluating the value of object
eval(x1)
[1] "2^3" [1] 8
