find the standard deviation of all elements in an array in r

To find the standard deviation of all elements in an array in R, you can use the sd() function. First, you need to create the array using the c() function, then apply the sd() function to the array. Here's an example:

main.r
# create an array
my_array <- c(2, 5, 7, 9, 12)

# find the standard deviation
sd(my_array)
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This will give you the standard deviation of all elements in the my_array array.