R Data Frames

What is a Data Frame?

A data frame is a table with rows and columns used to store structured data.

Each column can have a different data type.

Creating a Data Frame

Viewing Data

Accessing Columns

Indexing Rows and Columns

Adding a Column

Modifying Data

Filtering Data

Summary

Structure

Full Example

Why Data Frames are Important

• Store structured data
• Used in data analysis
• Core of R programming
• Used in visualization and statistics

Common Mistakes

• Confusing rows and columns
• Using incorrect indexes
• Forgetting commas in df[row, column]

Practice

Create a data frame with names and scores, add a new column, and filter the data.

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