Loading the dataset

Create and open a new IPython notebook. In the chapter's supplementary materials, you can see the file extraterrestrials.csv. Copy it to the same folder where you created your notebook. In the first cell of your notebook, execute the magical command:

In []: 
%matplotlib inline 

This is needed to see inline plots right in the notebook in the future.

The library we are using for datasets loading and manipulation is pandas. Let's import it, and load the .csv file:

In []: 
import pandas as pd 
df = pd.read_csv('extraterrestrials.csv', sep='t', encoding='utf-8', index_col=0) 

Object df is a data frame. This is a table-like data structured for efficient manipulations over the different data types. To see what's inside, execute:

In []: 
df.head() 
Out[]: 

	Length	Color	Fluffy	Label
0	27.545139	Pink gold	True	Rabbosaurus
1	12.147357	Pink gold	False	Platyhog
2	23.454173	Light black	True	Rabbosaurus
3	29.956698	Pink gold	True	Rabbosaurus
4	34.884065	Light black	True	Rabbosaurus

This prints the first five rows of the...