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Impara Unique Observations | Aggregate Functions
Introduction to pandas [track]

bookUnique Observations

You can get unique values of particular column by applying the .unique() method. Note, that this is Series method, so it works only for one column of DataFrame. For example, you can get all the cars' fuel types.

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# Importing library import pandas as pd # Reading csv file df = pd.read_csv('https://codefinity-content-media.s3.eu-west-1.amazonaws.com/67798cef-5e7c-4fbc-af7d-ae96b4443c0a/audi.csv') # Unique fuel types print(df.fuelType.unique())
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Also you can get the total number of unique values within specific column by applying .nunique() method to the column.

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# Importing library import pandas as pd # Reading csv file df = pd.read_csv('https://codefinity-content-media.s3.eu-west-1.amazonaws.com/67798cef-5e7c-4fbc-af7d-ae96b4443c0a/audi.csv') # Number of unique engine sizes print(df.engineSize.nunique())
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Sezione 4. Capitolo 2

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bookUnique Observations

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You can get unique values of particular column by applying the .unique() method. Note, that this is Series method, so it works only for one column of DataFrame. For example, you can get all the cars' fuel types.

1234567
# Importing library import pandas as pd # Reading csv file df = pd.read_csv('https://codefinity-content-media.s3.eu-west-1.amazonaws.com/67798cef-5e7c-4fbc-af7d-ae96b4443c0a/audi.csv') # Unique fuel types print(df.fuelType.unique())
copy

Also you can get the total number of unique values within specific column by applying .nunique() method to the column.

1234567
# Importing library import pandas as pd # Reading csv file df = pd.read_csv('https://codefinity-content-media.s3.eu-west-1.amazonaws.com/67798cef-5e7c-4fbc-af7d-ae96b4443c0a/audi.csv') # Number of unique engine sizes print(df.engineSize.nunique())
copy

Tutto è chiaro?

Come possiamo migliorarlo?

Grazie per i tuoi commenti!

Sezione 4. Capitolo 2
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