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What are vectors?
Vector operations
Indexing and filtering
Simple analysis
Summary

## Instruction

Well done! The great thing about R is that it also allows you to easily visualize your data. There are lots of built-in functions that are used for plotting. For a numeric vector, you can use a histogram to see the distribution of its elements. In R, a histogram is displayed with the function hist(), which takes a single vector as its argument, e.g.:

hist(ages)

After this function call, R will return the following plot:

As you can tell, the elements of our vector have been divided into ranges (in our case, the ranges are 20-25, 25-30, 30-35, 35-40, and 40-45). Each range (called a bucket) has its own corresponding height and represents the number of vector elements that fall within that range. The taller the bucket, the more elements the corresponding range contains.

## Exercise

Let's return to our salary example. Make a histogram for the vector named salaries.