Computer scienceData scienceInstrumentsPandasData preprocessing with pandas

Preprocessing categorical features with pandas

Ordinal encoding

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We have a DataFrame with the number of heroes in cities. We can encode the names of heroes according to ordinal encoding in the following way:

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data['Ordinal_hero'] = pd.factorize(data['Hero_Name'])

data['Ordinal_hero'] = data['Hero_Name']).map('cities')

data['Ordinal_hero'] = pd.get_dummies(data['Hero_Name'])[0] + 1

data['Ordinal_hero'] = pd.factorize(data['Hero_Name'])[0] + 1

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