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)
[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()
