What is one-hot encoding in Python?

What is one-hot encoding in Python?

One-hot encoding is a technique used to convert categorical variables into a binary matrix. Each category is represented as a vector.

Can you show me an example of one-hot encoding in Python?

Sure! You can use the pandas library. Here's a simple example:

import pandas as pd

data = {'Color': ['Red', 'Green', 'Blue']}
df = pd.DataFrame(data)

one_hot = pd.get_dummies(df, columns=['Color'])
print(one_hot)

What does the output look like?

The output will be a DataFrame with binary columns for each color:

   Color_Blue  Color_Green  Color_Red
0           0             0           1
1           0             1           0
2           1             0           0

Are there any other libraries for one-hot encoding?

Yes, you can also use scikit-learn's OneHotEncoder for one-hot encoding, which is useful for machine learning tasks.