Evaluate an Expression in R Programming - eval() Function

Convert an Expression to a String in R Programming - deparse() Function

Last Updated : 24 Jun, 2020

deparse() function in R Language is used to convert an object of expression class to an object of character class.

Syntax: deparse(expr) Parameters: expr: Object of expression class

Example 1:

Python3 1==

# R program to convert 
# expression to character

# Creating an object of expression class
x <- expression(sin(pi / 2))

# Class of object
class(x)

# Calling deparse() Function
x1 <- deparse(x)

# Class of parsed object
class(x1)

Output:

[1] "expression"
[1] "character"

Example 2:

Python3 1==

# R program to convert 
# expression to character

# Creating an object of expression class
x <- expression(2 ^ 3)

# Evaluating the value of object
eval(x)

# Calling deparse() Function
x1 <- deparse(x)

# Evaluating the value of object
eval(x1)

Output:

[1] 8
[1] "expression(2^3)"

Evaluate an Expression in R Programming - eval() Function

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