Learning Objectives

• What is DataFrame?
• Create a DataFrame

What is a DataFrame?

• Two-dimensional table
• Made up of a collection of Series
• Structured with labeled axes (rows and columns)

A data frame looks like a table, as shown in the image here:

Create a DataFrame

• You can create a DataFrame using a Python list or a NumPy array:

• Exercise: Try creating a DataFrame using a NumPy array.
• Don’t like python default index starting from ‘0’? Well, you can give your own column and row indexes:

• You can create a DataFrame using dictionary:

A Column is a Series

• A DataFrame is a collection of series.
• A series is a column in a table or a DataFrame.

• There are 3 series in the given DataFrame - ‘Regd. No’, ‘Names’ and ‘Marks%’.