Evaluate an Expression in R Programming - eval() Function

Create an Expression in R Programming - expression() Function

Last Updated : 24 Jun, 2020

expression() function in R Language is used to create an expression from the values passed as argument. It creates an object of the expression class.

Syntax: expression(character) Parameters: character: Expression, like calls, symbols, constants

Example 1:

Python3 1==

# R program to create an expression

# Calling expression() Function
x <- expression(2 ^ 3)
x

# Printing value of the expression
eval(x)

Output:

expression(2^3)
[1] 8

Example 2:

Python3 1==

# R program to create an expression

# Calling expression() Function
x <- expression(sin(pi / 2))
x

# Printing value of the expression
eval(x)

# Printing class of expression
class(x)

Output:

expression(sin(pi/2))
[1] 1
[1] "expression"

Evaluate an Expression in R Programming - eval() Function

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