cat.codes in python code example
Example 1: pandas categorical to numeric
dataset["sex"] = dataset["sex"].astype('category').cat.codes
Example 2: using df.astype to select categorical data and numerical data
df = pd.DataFrame({'vertebrates': ['Bird', 'Bird', 'Mammal', 'Fish', 'Amphibian', 'Reptile', 'Mammal']})
df.vertebrates.astype("category").cat.codes
Example 3: transform categorical variables python
from sklearn.preprocessing import LabelEncoder
lb_make = LabelEncoder()
obj_df["make_code"] = lb_make.fit_transform(obj_df["make"])
obj_df[["make", "make_code"]].head(11)
Example 4: using df.astype to select categorical data and numerical data
df.satisfaction.astype("category",
ordered=True,
categories=ordered_satisfaction
)