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Create an Expression in R Programming - expression() Function
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Repeatedly Evaluate an Expression in R Programming - replicate() Function

Last Updated : 30 Jun, 2020
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replicate() function in R Language is used to repeatedly evaluate a function or expression. It is member of apply family in R base package. In this article, we'll learn syntax and implementation of replicate() function with the help of examples.
Syntax: replicate(n, expr, simplify) Parameters: n: represents number of times the expression has to be evaluated expr: represents expression simplify: represents logical value. If TRUE, output is represented in vector or matrix form, otherwise in a list form
Example 1: r 
# Set the seed set.seed(10)  # Generate random numbers with mean = 0 and sd = 1 x <- rnorm(5, mean = 0, sd = 1)  # Print print(x)  # Evaluating it repeatedly r <- replicate(n = 3, rnorm(5, 0, 1), simplify = FALSE )  # Print print(r)
Output: 
  [1]  0.01874617 -0.18425254 -1.37133055 -0.59916772  0.29454513    [[1]]  [1]  0.3897943 -1.2080762 -0.3636760 -1.6266727 -0.2564784    [[2]]  [1]  1.1017795  0.7557815 -0.2382336  0.9874447  0.7413901    [[3]]  [1]  0.08934727 -0.95494386 -0.19515038  0.92552126  0.48297852
Example 2: r 
# Output to be present as PNG file png(file = "replicateGFG.png")  # Set the seed set.seed(10)  # Replicate values and create histogram hist(replicate(100, mean(rexp(10))))  # Saving the file dev.off()
Output:

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Create an Expression in R Programming - expression() Function
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utkarsh_kumar
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Article Tags :
  • R Language
  • R Math-Function

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