How to get samples from a data set in R

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  R Interview Questions

SAMPLE () function

# Generates 10 random numbers between 1 and 100
> sample(1:100,10)
 [1] 31 26 55  6 45 46 77 35 51 16

You can do samples with replacement as well.

# Generate 10 random numbers between 1 and 100 with replacement
> sample(1:100,10, replace = TRUE)
 [1] 54 72 54 75 43 18 78 89 55 28

Sampling is also used to generate training and test data from a dataset.