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Evaluate and Quote an Expression in R Programming – bquote() Function

  • Last Updated : 16 Jun, 2020
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bquote() function in R Language is used to quote the arguments passed to it, except the values which are wrapped in ‘.()‘. It evaluates the wrapped values and quotes the result.

Syntax: bquote(expr)

Parameters:
expr: language object

Example 1:




# R program to quote an expression
  
# Assigning value to variable
x <- 10
  
# Calling bquote() Function
bquote(x == x)
bquote(x == 10)
bquote(x == .(x))
bquote(x == .(x * 2))

Output:



x == x
x == 10
x == 10
x == 20

Example 2:




# R program to quote an expression
  
# Assigning value to variable
z <- 10
  
# Calling bquote() Function
bquote(function(x, y = .(z)) x + y)
  
# Plotting a graph with the default value
plot(1:10, z+(1:10), main = bquote(z == .(z)))

Output:

function(x, y = 10) x + y

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