Data Frames

The data.frame is, like we saw in 9  Data Structures, one of the core R data structures used in Statistics, Machine Learning, Data Science. Data frames store tabular data, where rows usually represent cases and columns usually represent variables. Columns can be of different classes/types, e.g. numeric (float), integer, character, factor.

When working with tabular data structures, core data science techniques to learn include:

• Reading in data (12  Base Data I/O)
• Filtering and selecting rows and columns (25  Working with Data frames)
• Reshaping (26  Reshaping)
• Joins (27  Joins)

See also

• data.table, a modern, highly optimized and powerful alternative to data.frame.