What is the eval() function in R?

Overview

The eval() function in R evaluates a given expression and returns the result.

Syntax

eval(expr)
Syntax for the eval() function

Parameter value

expr: This represents the expression to be evaluated.

Return value

The eval() function returns the result of evaluating the object.

Example

# Creating R expressions

a <- expression(3 * 5) 

b <- "3 * 5" 



# Implementing the eval() function

eval(a)

eval(b)





# Creating a function 

myfunction <- function(x, y){x + y}

eval(myfunction(1, 2))

Explanation

  • Lines 2 to 3: We create R expression variables a and b.
  • Lines 6 to 7: We use the eval() function to evaluate the expressions in a and b.
  • Line 11: We create a function myfunction with two parameter values.
  • Line 12: Using the eval() function, we evaluate the expression of the myfunction function containing its required arguments. We print the result to the console.

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