5.Learning R - Built-in Datasets, str() function and R Packages

R comes with several built-in datasets, which are used as demo data for working with R functions. In this video, we reviewed how to work with this datasets.
Then, we discussed str() funciton. The str short for structure. The structure function tells us the dimensions, the column names, the data type of the columns as well as the head or the first 10 observations of the data. It’s a really quick way to take a look at a dataset.
Finally, we gone through R packages. R packages or libraries are collections of functions, data, and code. Besides the core R packages, there are a myriad number of packages have been developed by the community. They increase the power of R by improving existing core R functionalities, or by adding extra features.

00:00 - Built-in datasets
00:37 - str() function
01:25 - R Packages