apply example in r

To apply an example in R, you can follow these steps:

1. Find or create an example code snippet that demonstrates the function or method you want to learn.
2. Open the R console or an R script editor.
3. Type or copy and paste the example code to the console or the script editor.
4. Press enter or run the script to execute the code.
5. Examine the output and the console messages to understand the behavior of the code.

Here is an example code that demonstrates the use of rnorm() function to generate random normal distribution:

main.r
set.seed(123) # set the seed for reproducibility
x <- rnorm(100, mean = 10, sd = 2) # generate 100 random numbers with mean 10 and standard deviation 2
hist(x) # plot a histogram of the generated data
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By typing or running this code in R, you will generate a histogram of a normal distribution with mean of 10 and standard deviation of 2, based on 100 randomly generated data points. This is an example of learning-by-doing, where you apply a concrete example to understand the syntax and behavior of a function in R.